Realtime coverage of U.S. EVA-26

Realtime coverage of U.S. EVA-26 (MDM EXT-2 replacement). Read More...

Dragon cargo ship attached to space station

Wrapping up a smooth two-day rendezvous, a SpaceX Dragon cargo ship was successfully attached to the International Space Station early Sunday, bringing nearly 5,000 pounds of supplies and equipment to the lab complex.
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SpaceX Falcon 9 boost Dragon/CRS-3 into orbit (UPDATED)

A SpaceX Falcon 9 rocket boosted a Dragon cargo capsule into orbit Friday, the first step in a two-day rendezvous with the International Space Station, the company's third commercial resupply mission.
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Kepler finds Earth-size planet in 'goldilocks' zone

Scientists analyzing data from the planet-hunting Kepler space telescope have chalked up another first, finding an Earth-size world orbiting in the habitable zone of its parent star, researchers announced Thursday.
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SpaceX aims for second launch try Friday

SpaceX is pressing ahead for another attempt Friday to launch a Falcon 9 rocket carrying a commercial cargo craft bound for the International Space Station, setting up an Easter Sunday rendezvous and berthing.
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SpaceX Dragon cargo flight to station scrubbed (UPDATED)

Launch of a SpaceX Falcon 9 rocket carrying a Dragon cargo capsule bound for the International Space Station was scrubbed Monday because of an apparent first stage helium leak, delaying the flight until Friday at the earliest.
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NASA studies glitch with backup ISS computer (UPDATED)

SpaceX engineers are pressing ahead with work to prepare a Falcon 9 rocket for launch Monday to boost a space station cargo ship into orbit. But a final decision will depend on troubleshooting to resolve problems with a failed computer unit aboard the lab complex. Read More...

Progress supply ship docks with space station (UPDATED)

A Russian Progress supply ship loaded with 2.9 tons of supplies and equipment bound for the International Space Station blasted off and streaked into space Wednesday, docking with the International Space Station six hours later. Read More...

Space station exempt from ban on NASA-Russia contact

NASA has been told to suspend contact with Russian government officials because of Russia's "ongoing violation of Ukraine's sovereignty and territorial integrity," according to an agency memo circulated Wednesday. The International Space Station is exempt.
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Soyuz TMA-12M docks with space station

A Russian Soyuz spacecraft carrying two cosmonauts and a NASA astronaut glided to a smooth linkup with the International Space Station Thursday, two days after a technical snag blocked a fast-track rendezvous and docking shortly after launch Tuesday.
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Soyuz on track for revised two-day station rendezvous

After a glitch interrupted a planned four-orbit rendezvous with the International Space Station Tuesday, the Soyuz TMA-12M crew pressed ahead Wednesday with a two-day rendezvous. Read More...

Soyuz sets off after station; rendezvous snag delays docking

Two Russian cosmonauts and a NASA astronaut rocketed smoothly into space aboard a Soyuz ferry craft Tuesday, but the crew ran into problems executing a required rendezvous rocket firing, delaying docking with the International Space Station until Thursday at the earliest.
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SpaceX delays Falcon 9/Dragon launch to station

Launch of a SpaceX Falcon 9 rocket carrying a cargo ship bound for the International Space Station has been delayed to no earlier than March 30 because of what sources described as apparent contamination that could pose problems for station-bound research hardware. Read More...

Soyuz crew lands in Kazakhstan (UPDATED)

Despite strained relations over Russian actions in Ukraine, superpower cooperation in space continued unabated Monday with two cosmonauts and a NASA astronaut departing the International Space Station for a fiery plunge back to Earth late Monday. (UPDATED) Read More...

Musk argues for competition in military launch contracts

In an ongoing debate over sky rocketing military launch costs, SpaceX founder Elon Musk told lawmakers Wednesday that allowing his company to launch high-priority military payloads would save taxpayers billions of dollars. Read More...

NASA unveils FY 2015 budget; commercial space funding urged

The Obama administration's $17.5 billion budget request for NASA in fiscal 2015 will maintain American leadership on the high frontier, agency Administrator Charles Bolden said Tuesday, urging Congress to fully fund development of commercial manned spacecraft. Read More...

Japan launches $1.2 billion weather research satellite

A Japanese H-2A rocket boosted a sophisticated weather research satellite into orbit Thursday, the centerpiece of a $1.2 billion international mission to study global precipitation in a bid to improve climate models, forecasting and understanding of the water cycle. Read More...

Kepler data reveals 715 newly found planets

A statistical analysis of data collected by NASA's Kepler space telescope has confirmed the discovery of 715 newly-found planets orbiting 305 stars, pushing to total number of known planets beyond Earth's solar system to nearly 1,700, researchers announced Wednesday.
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NASA vows to correct problems that led to dangerous EVA leak

A misunderstanding of how water behaves in a spacesuit operating in weightlessness, combined with institutional complacency and a perceived pressure to avoid delays, resulted in a frightening water leak during a 2013 spacewalk, a mishap board concluded. Read More...

ULA Delta 4 boosts GPS navsat into space

A United Launch Alliance Atlas 5 rocket thundered to life and climbed into space Thursday evening, boosting an upgraded Global Positioning System navigation satellite into orbit.
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NuSTAR sheds light on supernova mechanisms

A space-based X-ray telescope has detected the glow of radioactive titanium created in the catastrophic death throes of a distant star, shedding new light on the mechanisms that may be responsible for destroying massive suns. Read More...

Progress supply ship docks with space station

An unmanned Progress supply ship loaded with 2.8 tons of equipment and supplies rocketed into orbit Wednesday, chased down the International Space Station and glided to a smooth automated docking after a four-orbit rendezvous.
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Cameras re-installed in Russian spacewalk

Cosmonauts Oleg Kotov and Sergey Ryazanskiy re-installed two commercial cameras on the hull of the International Space Station Monday. Despite apparent signs of trouble with one camera, officials with Vancouver-based UrtheCast called the work a success. Read More...

Realtime coverage of Russian EVA-37A

Realtime coverage of Russian EVA-37A (UrtheCast camera installation; 2nd attempt) Read More...

ULA Atlas 5 launches NASA communications satellite

A United Launch Alliance Atlas 5 rocket boosted a new NASA Tracking and Data Relay Satellite into orbit Thursday, the second in a $715 million upgrade of the agency's globe-spanning communications network.
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Opportunity Mars rover marks 10 years on the red planet

NASA's solar-powered Opportunity Mars rover, designed to operate for just 90 days on the red planet's cold, dust-shrouded surface, celebrates 10 years of exploration Friday, enduring a few age-related aches and pains but still making valuable observations. Read More...

ESA's Rosetta comet probe wakes up from 2.5-year hibernation

After hibernating for 31 months, the European Space Agency's Rosetta probe woke itself up and phoned home Monday, a major milestone in a $1.7 billion attempt to orbit a comet and place a lander on its icy surface. Read More...

Cygnus cargo ship berthed at space station

A commercial cargo ship loaded with nearly 1.5 tons of supplies and equipment was captured by the International Space Station's robot arm early Sunday and attached to a docking port, wrapping up a complex but problem-free two-and-a-half-day rendezvous.
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Orbital Sciences Antares rocket blasts off on station cargo flight

Delayed one day by cold weather and another day by concern about space radiation, an Orbital Sciences Corp. Antares rocket carrying a commercially developed cargo ship blasted off Thursday and set off after the International Space Station.
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Station cargo mission delayed one day by space weather

Launch of an Orbital Sciences Antares rocket carrying a Cygnus cargo ship bound for the International Space Station was scrubbed Wednesday because of high space radiation levels after a solar flare. Based on a detailed analysis, the flight was retargeted for Thursday.
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Space station gets go ahead for operations through at least 2024

The Obama administration has given NASA the go-ahead to operate the International Space Station through at least 2024, the agency says, allowing government and private-sector researchers to count on at least another decade of operations. Read More...

SpaceX Falcon 9 boosts commercial relay station into orbit

An upgraded SpaceX Falcon 9 rocket boosted a commercial communications satellite into orbit Monday, kicking off the new year with the company's second commercial success in a row. Read More...

Realtime coverage of Russian EVA-37

Realtime coverage of Russian EVA-37 (UrtheCast camera installation; experiments) Read More...

Realtime coverage of U.S. EVA-25

Realtime coverage of U.S. EVA-25 (loop A ammonia pump module replacement). Read More...

Astronauts prep for second coolant repair spacewalk

Astronauts Rick Mastracchio and Mike Hopkins prepared their spacesuits Monday for a Christmas Eve spacewalk, their second in four days to complete an urgent cooling system repair job aboard the International Space Station's main power truss.
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Realtime coverage of U.S. EVA-24

Realtime coverage of U.S. EVA-24 (loop A ammonia pump module removal). Read More...

NASA confident spacesuits ready for cooling system repair work

Engineers are confident the spacesuits that will be used for two and possibly three excursions to repair the space station's coolant system are in good shape and that no problems with water leakage are expected. Read More...

NASA orders spacewalks to fix station coolant loop

After an exhaustive effort to come up with a fix for a balky valve in a space station coolant loop, NASA managers decided Tuesday to resolve the problem with two and possibly three spacewalks to replace a refrigerator-size ammonia pump module. Read More...

China's Chang'e-3 spacecraft lands on moon (UPDATED)

A Chinese spacecraft, carrying a suite of instruments and a small rover named Yutu, or "Jade Rabbit," settled to an on-target touchdown on the moon Saturday, the first such lunar landing in 37 years and a major achievement for the Chinese space program. Read More...

Station cargo flight delayed amid coolant system troubleshooting

NASA managers decided to delay launch of an Orbital Sciences Corp. space station cargo ship by at least one day amid ongoing work to come up with a fix for a balky valve in a cooling system that has forced the station crew to power down non-critical systems.
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ISS managers mull coolant system repair options

Engineers are running tests to figure out what is affecting the operation of a critical valve inside a coolant pump aboard the International Space Station that has forced flight controllers to shut down non-essential systems, curtailing science operations. Read More...

Engineers troubleshoot station cooling problem

A valve in a coolant system pump module aboard the International Space Station apparently malfunctioned Wednesday, triggering cooling problems in one external ammonia loop and prompting flight controllers to power down non-essential equipment. Read More...

Curiosity findings prompt new search strategy for organics

Studying an ancient lakebed on Mars, NASA's Curiosity rover team is now looking for areas where erosion may have uncovered pristine layers in which organic compounds -- and possibly remnant traces of life -- might still be found, scientists said Monday.
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Atlas 5 rocket carrying NRO spysat blasts off

A United Launch Alliance Atlas 5 rocket roared to life and climbed away from its California launch pad overnight Thursday, kicking off a classified mission to boost a National Reconnaissance Office spy satellite into orbit.
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Comet ISON's demise a boon to science

During the final hours of its one and only trip into the inner solar system, Comet ISON almost certainly disintegrated in the hellish glare and crushing grip of the sun, leaving a cloud of debris -- and a treasure trove of data -- in its wake. Read More...

SpaceX Falcon 9 launches first commercial comsat

SpaceX sucessfully launched an upgraded Falcon 9 rocket carrying an SES communications satellite Tuesday, the opening salvo in a closely watched bid to win a share of the commercial launch market with low-cost assembly-line boosters.
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SpaceX retargets commercial comsat launch

Launch of a SpaceX Falcon 9 rocket carrying a commercial communications satellite is now targeted for Tuesday evening, company officials said Monday, giving engineers more time to review data in the wake of a Thanksgiving Day launch abort .
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China launches Chang'e-3 lunar lander

A powerful Long March 3B rocket boosted China's first lunar lander into space Sunday, an unmanned mothership that will descend to the surface in mid December and deploy a rover named Yutu, or "Jade Rabbit," for independent scientific observations. Read More...

Russian Progress cargo ship docks with space station

Space station commander Oleg Kotov took over manual control of an approaching Progress supply ship Friday after an undisclosed problem and deftly guided the craft in for a smooth docking at the International Space Station's aft port. Read More...

Comet ISON lives up to reputation for surprises (UPDATED)

After a multi-million-year plunge from the frozen fringes of the solar system, Comet ISON may have broken apart and evaporated in the fierce heat and crushing gravity of the sun before or during a close flyby Thursday, scientist say. Or maybe not. (UPDATED) Read More...

SpaceX launch on hold after launch abort

Launch of a SpaceX Falcon 9 rocket carrying the company's first commercial communications satellite payload is on hold pending a data review and engine inspections after two launch tries Thursday, including a dramatic engine start and shut down. Read More...

Comet ISON closes in on the sun

Astronomers around the world are closely monitoring Comet ISON's plunge through the inner solar system and awaiting data from a fleet of space telescopes to find out whether the enigmatic chunk of ice will survive a blistering Thanksgiving Day flyby of the sun.
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SpaceX launch delayed by technical snags

Launch of an upgraded SpaceX Falcon 9 rocket carrying a commercial communications satellite was delayed Monday by unexplained technical snags late in the countdown. Launch was retargeted for Thursday. Read More...

SpaceX poised for high-stakes comsat launch

SpaceX, the upstart rocket company owned by tech maverick Elon Musk, faces what might be its biggest challenge Monday with the launch of a costly commercial communications satellite aboard an upgraded Falcon 9 rocket. Read More...

JFK's legacy: A race worth winning

President John F. Kennedy's decision to commit the United States to landing a man on the moon within a single decade, with only rudimentary ideas about how to do it and almost no space experience, was by today's standards an unimaginably daring gamble. Read More...

JFK's legacy: Setting America on course for the moon

In May 1961, John F. Kennedy, a charismatic young president with bold dreams for a re-energized America, stood in the eye of a perfect geopolitical storm when he decided to set the nation on course to the moon. Read More...

Rover engineers troubleshoot possible 'soft short'

Science observations by the Curiosity Mars rover are on hold pending tests to pin down the cause of an unexpected voltage change that was detected last Sunday, NASA said in a status report Wednesday. Read More...

International Space Station hits 15-year mark

Fifteen years ago, a Russian Proton rocket carrying the first module of what would become the International Space Station roared to life and climbed into orbit, kicking off one of the most complex -- and expensive -- engineering projects ever attempted. Read More...

MAVEN orbiter launched on 10-month flight to Mars

A new NASA Mars probe began a 10-month voyage to the red planet Monday, blasting off on a $671 million mission to study the martian atmosphere and the cause of a dramatic case of climate change.
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NASA Mars orbiter cleared for launch

NASA's next Mars probe is poised for launch Monday, weather permitting, to kick off a $671 million mission to find out why a good portion of the red planet's atmosphere leaked away ages ago in an extreme case of climate change.
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Stunning Cassini mosaic shows Earth, Mars and Venus

A spectacular panorama of the ringed planet Saturn, captured by NASA's Cassini spacecraft as it flew through the planet's shadow July 19, was unveiled Tuesday, showing Earth and its two sister planets, Mars and Venus as star-like points of light. Read More...

Soyuz returns to Earth with three station fliers and Olympic torch

Three station fliers strapped into their Soyuz TMA-09M ferry craft and plunged back to Earth Sunday, settling to a jarring rocket-assisted landing on the frigid steppe of Kazakhstan to close out a 166-day stay in space. Read More...

Realtime coverage of Russian EVA 36

Realtime coverage of Russian spacewalk No. 36. Read More...

Cosmonauts set for Olympic torch spacewalk

Two Russian cosmonauts plan to carry an unlighted Olympic torch outside the International Space Station Saturday, staging a symbolic spacewalk relay as part of the build up to the 2014 Winter Games. Read More...

Soyuz, with Olympic torch and crew of three, docks with space station

A Soyuz rocket carrying a crew of three and an Olympic torch heralding the 2014 Winter Games in Sochi, Russia, streaked into orbit Wednesday and docked with the International Space Station early Thursday. Read More...

Kepler finds Earth-size planets commonplace

Data collected by NASA's Kepler space telescope indicates one in five sun-like stars likely hosts an Earth-size planet in the habitable zone where life as it is known on Earth can, in theory, exist, scientists say. Read More...

Sierra Nevada investigates Dream Chaser landing mishap

A landing gear malfunction that caused a small commercial spacecraft to skid off the runway after its first unmanned flight Saturday caused relatively minor damage, an official with builder Sierra Nevada said. Read More...

Scott Carpenter, Mercury 7 astronaut, dies at 88

Malcolm Scott Carpenter, one of the original seven Mercury astronauts who was forced to take manual control of his Aurora 7 capsule in a frightening re-entry, died early Thursday. He was 88.
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Juno probe in safe mode, but managers optimistic about recovery

NASA's Jupiter-bound Juno spacecraft went into "safe mode" just 10 minutes after a gravity-assist flyby of Earth Wednesday, but managers said Thursday they are back in touch and the spacecraft appears healthy.
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Jupiter-bound Juno races toward Earth flyby

Returning to its starting point after a loop out beyond the orbit of Mars, NASA's Juno probe raced toward Earth Wednesday for a velocity-boosting flyby, using the planet's gravity to fling the craft on to Jupiter.
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NASA shuts down in funding impasse

With the federal government in partial shutdown, NASA is implementing drastic, across-the-board furloughs that will severely curtail ongoing research and development.
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SpaceX launches upgraded Falcon 9 rocket

In a dramatic California test flight, SpaceX launched an upgraded, more powerful version of its Falcon 9 rocket Sunday -- a booster the company hopes will someday carry astronauts to the space station. Read More...

Cygnus cargo ship completes rendezvous, station capture

A commercial cargo ship making its maiden flight was successfully captured by the International Space Station's robot arm early Sunday in a major milestone for NASA.
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Soyuz takes off with three bound for space station

A Russian Soyuz rocket carrying two cosmonauts and a NASA astronaut blasted off from Kazakhstan Wednesday, climbed into orbit and docked with the International Space Station after a six-hour rendezvous. Read More...

Commercial cargo ship aborts initial approach to station

An Orbital Sciences Corp. Cygnus cargo ship making its maiden flight to the International Space Station aborted its initial approach to the lab complex early Sunday because of suspect navigation data.
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Orbital Sciences launches Cygnus cargo ship on maiden flight

In a critical test flight for NASA's space station program, an Orbital Sciences Corp. Antares rocket blasted off Wednesday, lofting a Cygnus cargo ship on its maiden flight to the international lab complex. Read More...

Atlas 5 rocket boosts military comsat into orbit

A United Launch Alliance Atlas 5 rocket boosted a $900 million military communications satellite into space early Wednesday, the third in a series of high-speed, jam-resistant relay stations.
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Orbital Sciences preps Cygnus cargo ship for station flight

In a major milestone for NASA, Orbital Sciences Corp. is readying an Antares rocket for launch Wednesday to boost an unmanned Cygnus cargo ship on a maiden flight to the International Space Station.
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In historic first, Voyager 1 sails into interstellar space

NASA's Voyager 1 spacecraft, 36 years and 12 billion miles from Earth, has crossed the boundary between the sun's influence and interstellar space, becoming humanity's first true starship, scientists said Thursday.
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Soyuz TMA-08M brings three station fliers safely back to Earth

Closing out a 166-day stay in orbit, two cosmonauts and a NASA astronaut rode a Russian Soyuz spacecraft back to Earth Tuesday, settling to a jarring rocket-assisted touchdown on the steppe of Kazakhstan.
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NASA launches moon probe to study thin lunar atmosphere

Lighting up the night sky with a trail of fiery exhaust, an Orbital Sciences Minotaur 5 rocket blazed away from the Virginia coast late Friday, boosting a small NASA probe on a trajectory toward the moon. Read More...

NASA preps innovative probe for launch on moon mission

An innovative spacecraft perched atop a five-stage booster is poised for launch from the Virginia coast late Friday on a mission to study the moon's ultra-thin atmosphere look for signs of suspended moon dust. Read More...

Delta 4-Heavy boosts NRO spysat into space

A United Launch Alliance Delta 4 Heavy, the most powerful rocket in the U.S. inventory, thundered away from Vandenberg Air Force Base, Calif., Wednesday on a classified National Reconnaissance Office mission. Read More...

Realtime coverage of Russian EVA-35

Cosmonauts Fyodor Yurchikhin and Alexander Misurkin staged a five-hour 58-minute spacewalk Thursday to mount a camera aiming platform on the space station and to tighten loose antenna covers. Read More...

C. Gordon Fullerton, legendary aviator-astronaut, dies

Former shuttle commander C. Gordon Fullerton, a legendary aviator who flew two space missions, died Wednesday after a long illness. He was 76. Read More...

NASA introduces new astronaut class

NASA introduced eight new astronaut candidates to the public Tuesday, four men and four women who initially will focus on space station operations. Read More...

Realtime coverage of Russian EVA-34

Cosmonauts Fyodor Yurchikhin and Alexander Misurkin set a new Russian EVA record Friday, spending seven hours and 29 minutes outside the International Space Station to lay cables for a new lab module. Read More...

NASA studies alternative missions for crippled Kepler

Engineers have concluded NASA's Kepler space telescope will no longer be able to search for Earth-size planets because of trouble with the spacecraft's gyroscopic stabilization system.
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Japanese HTV cargo ship attached to space station

A Japanese cargo ship loaded with nearly 4 tons of science gear, supplies and spare parts was attached to the International Space Station Friday after a near-flawless rendezvous.
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Delta 4 lofts WGS military comsat into orbit

A United Launch Alliance Delta 4 rocket carrying the latest in an international fleet of military communications satellites climbed into orbit Wednesday after a picture-perfect Florida launch. Read More...

Curiosity Mars rover marks one year on red planet

One year after a nail-biting descent to the surface of Mars, NASA's $2.5 billion Curiosity rover, fresh from confirming the red planet was habitable in the distant past, is making its way to the base of Mount Sharp. Read More...

Japanese cargo ship launched on station resupply flight

An unmanned Japanese cargo ship loaded with nearly 4 tons of science gear, spare parts and supplies rocketed away from Japan Saturday, kicking off a six-day flight to the International Space Station.
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Cassini captures stunning images of Saturn, rings and distant Earth

NASA's Cassini spacecraft has beamed back spectacular pictures of Saturn, its rings and distant Earth, a "pale blue dot" nearly a billion miles away, as the robot passed behind the ringed planet last Friday.
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Atlas 5 boosts heavyweight Navy comsat into orbit

A heavyweight Navy communications satellites was boosted into space by a United Launch Alliance Atlas 5 rocket Friday, the second in a series of five relay stations in a globe-spanning $5 billion network.
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Cassini poised to take photo of 'pale blue dot'

NASA's Cassini spacecraft is poised to snap a dramatic portrait of Earth Friday, capturing a mosaic showing humanity's home in space as a pinprick of light just to one side of Saturn's spectacular rings.
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Proton crash likely caused by incorrect sensor installation

The dramatic failure of a heavy-lift Russian Proton rocket seconds after launch July 2 may have been caused by incorrectly installed guidance sensors in the booster's first stage, Russian officials say. Read More...

Parmitano praised for 'grace under pressure' in aborted spacewalk

A dangerous leak resulting in a large blob of water sloshing inside Italian astronaut Luca Parmitano's space helmet forced NASA to abort a planned six-and-a-half-hour spacewalk Tuesday.
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Realtime coverage of U.S. EVA-23 (spacewalk terminated)

Astronauts Christopher Cassidy and Luca Parmitano cut short a planned 6.5-hour spacewalk Tuesday because of an unusual, and potentially dangerous buildup of water in Parmitano's helmet. Read More...

2020 Mars rover to search for evidence of past life

A team of scientists studying possible mission scenarios for a planned 2020 Mars mission modeled on NASA's Curiosity rover has recommended a spacecraft designed to look for traces of past life. Read More...

Realtime coverage of U.S. EVA-22

Astronauts Christopher Cassidy and Luca Parmitano staged a successful six-hour seven-minute spacewalk Tuesday, the first of two planned over seven days to work through a backlog of space station tasks. Read More...

Russian Proton rocket failure prompts investigation

The Russian prime minister ordered an investigation into the failure of a Proton rocket that veered wildly out of control seconds after liftoff and crashed back to Earth, destroying three navigation satellites. Read More...

Shuttle Atlantis centerpiece of spectacular display

The space shuttle Atlantis, the last of NASA's winged orbiters to fly in space, goes on public display at the Kennedy Space Center visitors complex Saturday, the centerpiece of a spectacular $100 million facility.
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Pegasus rocket carries sun-study satellite into orbit

A winged Pegasus rocket lifted a compact solar observatory into orbit around Earth's poles Thursday to study the mysterious mechanisms that heat up the sun's outer atmosphere to extreme temperatures. Read More...

Shenzhou 10 returns to Earth; crew in good spirits (UPDATED)

After 15 days in space and two dockings with a prototype space station module, the Shenzhou 10 spacecraft brought three astronauts back to Earth Tuesday to close out China's fifth manned mission.
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Realtime coverage of Russian EVA-33

Cosmonauts Fyodor Yurchikhin and Alexander Misurkin staged a successful six-hour 34-minute spacewalk Monday, making preparations for installation of a new Russian laboratory module later this year. Read More...

Armstrong honored by crewmates, JSC co-workers

Neil Armstrong's crewmates and co-workers at the Johnson Space Center shared memories of the "reluctant hero" during a memorial service Thursday. Read More...

Draft House bill would cut NASA funding by $1 billion

A draft House NASA authorization bill would eliminate funding for the Obama administration's proposed asteroid retrieval mission and cut overall agency spending by about $1 billion, lawmakers said Wednesday.
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European cargo ship docks with space station

An unmanned European Space Agency cargo ship loaded with 7.3 tons of supplies, spare parts and science gear docked with the International Space Station early Saturday. Read More...

China launches 5th manned space mission

A Shenzhou spacecraft carrying a crew of three, including China's second female astronaut, streaked into orbit Tuesday and set off after a prototype space station module for a planned two-week mission.
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Ariane 5 boosts European cargo ship on course to station

A powerful Ariane 5 rocket vaulted away from its South American launch pad Wednesday, lofting an unmanned European Space Agency cargo ship on a flight to the International Space Station. Read More...

Curiosity poised to begin trek to Mount Sharp

Ten months after landing, NASA's Curiosity Mars rover is poised to begin the long trek to Mount Sharp, a towering mound of layered rock that is expected to shed new light on the planet's history and habitability.

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Rover data comfirm dangers of space radiation

Future manned missions to Mars will require internal shielding and advanced propulsion systems to shorten transit times, minimizing exposure to caner-causing space radiation, scientists said Thursday. Read More...

Hubble stays relevant on astronomy's high frontier

Despite steady advances in ground-based astronomy, the Hubble Space Telescope remains an icon of world-class science, more productive today than at any point in its history, scientists say. Read More...

Soyuz rocket blasts off, carries three to space station (UPDATED)

A Soyuz rocket blasted off Tuesday and thundered into orbit carrying a veteran cosmonaut, a NASA shuttle veteran and a rookie Italian test pilot on a fast-track flight to the International Space Station. Read More...

Soyuz prepped for launch to space station (mission preview)

Engineers prepped a Soyuz spacecraft for launch Tuesday to ferry three crew members -- a veteran Russian cosmonaut, an Italian test pilot and an American shuttle veteran -- to the International Space Station. Read More...

Delta 4 boosts military comsat into orbit

A United Launch Alliance Delta 4 rocket vaulted away from Cape Canaveral Friday and lofted a $342 million military communications satellite into orbit after a picture-perfect climb to space.
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Atlas 5 boosts GPS navsat into space

A United Launch Alliance Atlas 5 rocket boosted a new Global Positioning System satellite into space Wednesday, the latest in a series of upgraded navigation beacons with improved accuracy and longevity.
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Kepler space telescope sidelined by reaction wheel problem

NASA's $600 million Kepler Space Telescope, a leading player in the hunt for Earth-like planets orbiting sun-like stars, has been sidelined by problems with stabilizing gyroscopic reaction wheels. Read More...

Station trio undocks, returns to Earth

A Soyuz spacecraft carrying three outgoing space station crew members undocked Monday, on track for landing in Kazakhstan to close out a 146-day mission. Read More...

Realtime coverage of U.S. EVA-21

Astronauts Thomas Marshburn and Christopher Cassidy carried out a five-hour 30-minute spacewalk Saturday to remove and replace a suspect coolant pump assembly on the space station's power truss. Read More...

ISS managers hopeful pump replacement will resolve coolant leak

NASA managers are hopeful the replacement of a pump module during an impromptu spacewalk Saturday will eliminate an ammonia coolant leak aboard the International Space Station, officials said Friday.
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NASA troubleshoots ammonia coolant leak; spacewalk on tap

Pending final approval, space station astronauts are gearing up for an unscheduled spacewalk Saturday to look for the source of an ammonia coolant leak on the far left end of the lab's solar power truss. Read More...

Progress docks with station; jammed antenna no problem

A Russian cargo ship hobbled by a jammed navigation antenna glided into its port on the International Space Station early Friday, completing a dramatic automated rendezvous. Read More...

Progress cargo ship takes off for station; antenna issue assessed

Russian flight controllers are troubleshooting a problem with a navigation antenna on an unmanned Progress supply ship launched Wednesday on a two-day flight to the International Space Station. Read More...

Orbital Sciences launches Antares rocket on successful test flight

A commercially developed rocket blasted off from the Virginia coast and streaked into space Sunday, chalking up a picture-perfect maiden flight that sets the stage for space station cargo flights later this year. Read More...

Antares launch delayed by high winds

For the second time in four days, the maiden flight of a powerful new rocket designed to boost space station cargo ships into orbit was called off Saturday, this time because high upper-level winds, officials said.
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Russian EVA-32

Cosmonauts Pavel Vinogradov and Roman Romanenko staged a six-hour 38-minute spacewalk Friday, accomplishing their primary objectives but dropping an experiment panel overboard. Read More...

Antares launch delayed to Saturday to avoid bad weather

Running two days late, Orbital Sciences managers decided Thursday to delay the maiden flight of the company's new Antares rocket one more day to Saturday because of expected bad weather. Read More...

Kepler closing in on Earth-like exoplanets

NASA's Kepler space telescope has discovered the smallest worlds yet found orbiting in or near the habitable zones of two distant suns, researchers report.
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Antares launch delayed 48 hours by last-minute glitch

The maiden flight of a new rocket designed to loft space station cargo ships into orbit was called off 12 minutes before liftoff Wednesday when an umbilical unexpectedly pulled away from the second stage. Read More...

Orbital Sciences Antares rocket cleared for maiden flight

Orbital Sciences Corp. made final preparations Tuesday for the first flight of its Antares rocket, a commercially-built booster designed to launch cargo ships to the International Space Station. Read More...

NASA mulls asteroid capture mission, eventual manned visits

NASA is working on plans to robotically capture and tow a small asteroid back to Earth's vicinity by the end of the decade, setting the stage for manned visits in the early 2020s, officials say. Read More...

Initial AMS data consistent with dark matter, but not yet proof

A $2 billion cosmic ray detector attached to the International Space Station has detected positrons that could be the result of dark matter interactions, but scientists say more observations are needed to be sure.
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Soyuz TMA-08M docks with station after four-orbit rendezvous

A veteran Russian commander, a rookie cosmonaut and a Navy SEAL-turned-astronaut blasted off Thursday and docked with the International Space Station less than six hours later. (UPDATED) Read More...

SpaceX cargo ship returns to Earth

A commercial cargo capsule plunged back to Earth Tuesday, wrapping up a month-long space station resupply mission with an on-target splashdown in the Pacific Ocean. Read More...

Atlas 5 boosts missile early warning satellite into space

A United Launch Alliance Atlas 5 rocket boosted a missile early warning satellite into space Tuesday, the second in a new generation of infrared surveillance stations.
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Soyuz TMA-06M brings three station fliers back to Earth

Running a day late, three space station crewmen strapped into their Soyuz ferry craft and dropped out of orbit Friday, plunging to a touchdown on the fog-shrouded Kazakh steppe to close out a 144-day mission.
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Dismal weather prompts 24-hour delay for Soyuz landing

Dismal weather in Kazakhstan forced Russian flight controllers to order a one-day landing delay for two Russian cosmonauts and a NASA astronaut who are closing out a nearly five-month stay in space. Read More...

Mars rover confirms habitable environment in distant past

Analyzing samples drilled from the interior of a sedimentary rock, the Curiosity Mars rover has detected traces of the chemicals and compounds necessary for a habitable environment in the distant past. Read More...

Curiosity computer swap, troubleshooting, continues

Work to switch operations to a backup flight computer aboard the Curiosity Mars rover is continuing amid analysis to figure out how to fix memory corruption discovered last week in the rover's active computer. Read More...

Dragon cargo ship captured, berthed at station (UPDATED)

After a flawless rendezvous, a SpaceX Dragon cargo capsule was captured by the International Space Station's robot arm early Sunday, bringing more than a ton of supplies and equipment to the outpost. Read More...

Dragon cargo ship cleared for Sunday capture (UPDATED)

With its propulsion system working flawlessly, a SpaceX cargo ship loaded with supplies and equipment was cleared by NASA Saturday to press ahead for a day-late capture by the lab complex early Sunday.
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SpaceX restores Dragon thrusters (UPDATED)

A SpaceX cargo ship bound for the International Space Station thundered into orbit Friday, but trouble with maneuvering thrusters triggered extensive analysis and a delayed rendezvous. Read More...

Engineers assess Curiosity computer glitch (UPDATED)

Space radiation may be to blame for corrupted memory used by the Curiosity Mars rover's flight computer, resulting in software glitches that interrupted the flow of science data Wednesday. Read More...

SpaceX set for second Dragon resupply mission

SpaceX readied a Falcon 9 rocket and Dragon cargo ship for launch Friday to deliver more than 2,300 pounds of science gear, spare parts and crew supplies to the International Space Station. Read More...

X-ray telescopes measure black hole rotation, space distortion

An innovative NASA X-ray telescope working in concert with a European Space Agency satellite has measured the rotation of a supermassive black hole lurking at the heart of a distant galaxy. Read More...

Space advocates propose manned Mars flyby mission

A wealthy space tourist announced plans Wednesday to launch a high-risk manned flight to Mars in 2018, sending a man and a woman on a bare-bones 501-day round-trip flyby.
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Curiosity delivers first drill sample

The Curiosity rover's power drill has successfully collected its first subsurface sample, about a tablespoon of powdered rock that will be fed into the spacecraft's on-board laboratory instruments for detailed analysis. Read More...

Kepler spies smallest exoplanet yet

NASA's Kepler spacecraft has discovered a solar system 210 light years from Earth with the smallest planet yet found orbiting another sun-like star. Read More...

Space station comm glitch assessed

A procedural issue during a software update aboard the International Space Station Tuesday briefly knocked the lab's satellite communications system out of action, but the problem was quickly resolved.
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Astronomers eagerly await asteroid flyby

An asteroid a half a football field across is expected to safely pass within just 17,200 miles of Earth on Friday, a record close encounter that will carry it well inside the orbits of communications satellites. Read More...

Russian supply ship takes off on station resupply flight

A Russian supply ship loaded with 2.9 tons of supplies and equipment blasted off Monday and flew a fast-track trajectory to docking with the International Space Station just six hours later. (UPDATED)
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NASA launches Earth observation satellite

An Atlas 5 rocket blasted off from California Monday and boosted a new Earth-watching Landsat into its planned polar orbit to kick off an $885 million mission to monitor the planet and its resources. (UPDATED) Read More...

In major milestone, Curiosity drills into Mars rock

In a long-awaited milestone, the Curiosity Mars rover successfully drilled into a martian rock, prompting NASA science chief John Grunsfeld to declare the nuclear-powered robot fully operational. Read More...

Study indicates Earth-like planets likely commonplace

A new study indicates some 60 percent of the galaxy's most ubiquitous stars likely host planets smaller than Neptune and about 6 percent host Earth-size worlds orbiting in the so-called "Goldilocks" zone. Read More...

NASA honors fallen astronauts

In an emotional memorial, the widow of the shuttle Columbia's commander recalled their last meeting the day before launch and the devastation the families felt when they learned their loved ones had perished.
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Remembering Columbia

Recalling the 2003 Columbia disaster. An essay by William Harwood. Read More...

Atlas 5 boosts NASA comsat into space

A United Launch Alliance Atlas 5 rocket rumbled to life and blasted off from the Cape Canaveral Air Force Station Wednesday evening, boosting a powerful NASA Tracking and Data Relay Satellite into orbit. Read More...

Sierra Nevada welcomes Lockheed Martin to Dream Chaser project

Lockheed Martin Space Systems Co. is joining Sierra Nevada Corp.'s Dream Chaser commercial manned spacecraft program to help with flight certification and composites manufacturing, officials say. Read More...

Opportunity Mars rover moves into 10th year of operations

NASA's Opportunity Mars rover, with a design life of just 90 days, moves into its 10th year of operations, exploring the rim of Endeavour Crater. Principal Investigator Steve Squyres discusses the mission. Read More...

Company envisions asteroid mining

A second company has jumped into what the founders hope will be a lucrative emerging market, prospecting for raw materials among near-Earth asteroids using fleets of low-cost robotic spacecraft. Read More...

Bigelow inflatable module bound for space station

An inflatable module developed by a Las Vegas hotel entrepreneur will be attached to the International Space Station in 2015 for a two-year test run to evaluate the technology's performance in space. Read More...

Europe to build Orion service module

The European Space Agency will supply the service module that will power an initial unmanned test flight of NASA's Orion deep space exploration capsule in 2017, officials say.
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Mars rover finds more evidence of watery past

Taking their time with a surprising variety of scientific targets, scientists are gearing up to test the Curiosity Mars rover's powerful impact drill before beginning a year-long trek to Mount Sharp some six miles away. Read More...

Company test pilots to make first commercial spaceflights

The first American manned spacecraft to reach orbit in the wake of the shuttle's retirement will be crewed by company test pilots -- not NASA astronauts -- as early as mid 2015, company officials say.
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Soyuz TMA-07M docks with space station

A Russian Soyuz spacecraft glided to a smooth holiday docking with the International Space Station Friday, bringing three fresh crew members to the lab complex after a two-day orbital chase.
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Soyuz and three-man crew blast off on flight to space station

Braving arctic temperatures, a Russian Soyuz spacecraft roared to life and streaked smoothly into orbit Wednesday, carrying a veteran three-man crew on a two-day flight to the International Space Station. Read More...

Soyuz set for flight to space station

Looking forward to Christmas in orbit, a Russian cosmonaut, a Canadian shuttle veteran and a NASA physician-astronaut made final preparations for blastoff Wednesday aboard a Soyuz spacecraft. Read More...

As planned, moon probes crash into lunar cliff

Going out with a bang, two small NASA probes that flew in formation to precisely map the moon's gravity field crashed into a mile-high mountainside Monday, bringing a successful mission to an abrupt end.
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Successful moon mission set for kamikaze conclusion

Two washing machine-size science probes that have completed their mission to map the lunar gravity field will slam into a mile-high mountainside Monday, bringing a successful mission to a kamikaze conclusion.
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Air Force launches unmanned spaceplane on third flight

A United Launch Alliance Atlas 5 rocket blasted off from the Cape Canaveral Air Force Station Tuesday, boosting an unmanned military spaceplane into orbit for the program's third classified mission. Read More...

Yearlong station flight challenging but doable, astronaut says

Spending a year in the cramped confines of the International Space Station will be challenging, but the two crewmen who plan to do just that in 2015-16 say they don't anticipate any major problems. Read More...

NASA announces new Mars rover

NASA announced plans Tuesday to build and launch a new rover to the red planet in 2020 based on the design of the agency's hugely successful Curiosity. Read More...

Voyager enters unexpected region near edge of interstellar space

NASA's aging Voyager 1 probe has crossed into an unexpected, exceedingly remote region of the solar system that may represent the spacecraft's final step before moving into the vast realm of interstellar space.
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Curiosity detects organics, but more tests needed for conclusive result

NASA's Curiosity rover has found traces of simple organic compounds in a martian soil sample, but more tests are needed to rule out the presence of any lingering earthly contaminants in the rover's science gear. Read More...

NASA spacecraft finds strong evidence for ice on Mercury

NASA's Messenger spacecraft has found strong evidence for vast ice deposits in ultra-cold, permanently shadowed craters near the poles of hellish Mercury, scientists said Thursday.
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Mars rover sparks curiosity, but NASA downplays speculation

NASA is downplaying widespread speculation that one of the Curiosity Mars rover's instruments, designed to look for organic compounds, has made a major discovery. A news conference is planned Monday. Read More...

Kelly, Kornienko named to yearlong station flight

Astronaut Scott Kelly and cosmonaut Mikhail Kornienko, both veterans of long-duration space flights, will spend a full year aboard the International Space Station in 2015-16, NASA said Monday. Read More...

Soyuz brings three station fliers back to Earth (UPDATED)

Three space station fliers strapped into their Soyuz ferry craft, undocked and plunged back to Earth Sunday, making a fiery descent to a frigid pre-dawn landing in Kazakhstan to close out a 127-day stay in space. Read More...

Mars rover gears up to move on after initial sample collection

Buffeted by ethereal whirlwinds and twisters, the Curiosity Mars rover is wrapping up initial soil analysis operations and preparing to move on in search of suitable targets for a compact rock drill. Read More...

Mars rover sniffs atmosphere, finds no clear signs of methane

NASA's Curiosity Mars rover has not found any definitive evidence of methane in the thin air at the Gale Crater landing site, project scientists said Friday, but additional observations are planned.
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Shuttle Atlantis makes final journey

The shuttle Atlantis was hauled out of the cavernous Vehicle Assembly Building for the final time Friday, the last of the iconic winged orbiters to make the transition to Earth-bound museum duty.
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Realtime coverage of U.S. EVA-20 (P6 coolant radiator bypass)

Station commander Sunita Williams and Japanese astronaut Akihiko Hoshide successfully bypassed a suspect solar array radiator and extended a spare panel in a bid to pinpoint the source of a leak.
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Progress supply ship docks; space station maneuvers to avoid debris (UPDATED)

Amid spacewalk preparations, the Russians launched a Progress supply ship, monitored its automated docking with the space station and then adjusted the lab's orbit to avoid a piece of space debris. Read More...

SpaceX cargo capsule leaves station, returns to Earth (UPDATED)

In a major milestone for the space station program, a commercial cargo capsule loaded with experiment samples returned to Earth Sunday, plunging back through the atmosphere to a Pacific Ocean splashdown.
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Coolant leak prompts Nov. 1 station spacewalk

Space station commander Sunita Williams and Akihiko Hoshide plan a Nov. 1 spacewalk to isolate a small, but growing leak in a solar array ammonia coolant loop. Read More...

Soyuz TMA-06M with three-man crew docks with space station

A Russian Soyuz spacecraft carrying two cosmonauts and a NASA astronaut glided to a smooth docking with the International Space Station Thursday, boosting the lab's crew back to six. Read More...

Russian Soyuz prepped for launch to space station

Facing a particularly intense first week in space, two cosmonauts and a NASA shuttle veteran geared up for launch early Tuesday aboard a Russian Soyuz spacecraft bound for flight to the International Space Station. Read More...

Rover begins soil analysis; scientists ponder bright fragment

The Curiosity Mars rover is processing its first soil sample in an instrument designed to identify the minerals present in soil and rock samples. A small shiny fragment near the rover is thought to be naturally occurring. Read More...

SpaceX Dragon capsule attached to space station (UPDATED)

A commercial cargo capsule loaded with a half-ton of supplies and equipment was captured by the International Space Station's robot arm early Wednesday after a flawless final rendezvous.
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Singer Sarah Brightman announces plans to visit space station

Soprano Sarah Brightman, believed to be one of the world's wealthiest classical crossover performers, has bought a seat on a Russian Soyuz spacecraft for a 10-day visit to the International Space Station. Read More...

SpaceX studies Falcon 9 engine failure

SpaceX engineers are reviewing telemetry to figure out what caused a dramatic first stage engine failure Sunday night during launch of a commercial cargo ship bound for the International Space Station. Read More...

SpaceX rocket boosts Dragon cargo ship into orbit (UPDATED)

An unmanned cargo capsule built by SpaceX under a $1.6 billion commercial contract with NASA was boosted into orbit Sunday on its first operational flight to the International Space Station. Read More...

Despite low thrust, Delta 4 boosts GPS satellite into orbit (UPDATED)

A United Launch Alliance Delta 4 rocket boosted a Global Positioning System satellite into space Thursday to replace a navigation station that has operated twice as long as expected. Read More...

Space station partners approve yearlong stay in 2015-16

An American astronaut and a Russian cosmonaut will spend a full year aboard the International Space Station in 2015-16, twice as long as current crews, to collect medical data on long-duration spaceflight.
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Curiosity gets the scoop on Mars

The Mars Curiosity rover is pausing for a few weeks near fine-grained sand dunes to scoop up soil and run it through the vehicle's sample acquisition system to clean out lingering traces of Earth's environment.
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Mars rover finds ancient streambed frozen in conglomerate rock

NASA's Curiosity Mars rover has found outcrops of conglomerate rocks made up of eroded gravels that scientists believe were transported across the floor of Gale Crater by a "vigorous" flow of water. Read More...

European cargo ship undocking aborted

Trouble with a control panel aboard the Russian Zvezda command module prevented the planned undocking of an unmanned European cargo ship from the International Space Station Tuesday. Read More...

Hubble 'extreme deep field' captures oldest galaxies yet seen

A two-million-second time exposure using cameras aboard the Hubble Space Telescope has captured images of proto galaxies as they appeared just 450 million years after the big bang. Read More...

Shuttle Endeavour flies into retirement with final landing

Feeling the wind on its wings for the last time, the space shuttle Endeavour, bolted to the back of a NASA jumbo jet, closed out a three-day valedictory tour Friday, landing at Los Angeles International Airport. Read More...

Shuttle Endeavour makes final stop at Edwards AFB

The shuttle Endeavour, on its way to retirement in Los Angeles, flew from Houston to Edwards Air Force Base atop a 747 jumbo jet Thursday, dropping down for low passes over communities along the way.
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Curiosity poised for first 'hands-on' geology

The Curiosity Mars rover, more than halfway to its first scientific destination, is pausing for a few days to carry out its first hands-on geology, focusing on a pyramid-shaped rock known as 'Jake.' Read More...

Shuttle Endeavour heads for California (UPDATED)

Bolted to the back of a 747 jumbo jet, the space shuttle Endeavour took off on its final voyage Wednesday, a "bittersweet" valedictory tour on the way to museum duty in Los Angeles. Read More...

Shuttle Endeavour set for final flight to LA museum

The shuttle Endeavour was prepped for takeoff Wednesday on a cross-country tour atop a 747 transport jet, giving the public one last chance to see the orbiter in flight before transfer to a Los Angeles museum. Read More...

Soyuz TMA-04M lands in Kazakhstan

Two Russian cosmonauts and a NASA flight engineer undocked from the International Space Station and fell back to Earth Sunday, making a pinpoint landing in Kazakhstan to close out a 125-day voyage. Read More...

Armstrong buried at sea

With his family looking on, Neil Armstrong, the first man on the moon, was buried at sea Friday. Read More...

Armstrong remembered as 'reluctant hero'

Neil Armstrong, the unassuming test pilot, family man and reluctant hero who will forever walk in history as the first man on the moon, was honored at the Washington National Cathedral Thursday. Read More...

Curiosity set to resume roving after robot arm tests

Engineers testing the Curiosity Mars rover are wrapping up a series of robot arm calibration and motion tests before resuming a slow trek toward a nearby rock formation this weekend. Read More...

Mars rover pauses for robot arm checkout

NASA's Curiosity Mars rover, now about 270 feet from its landing site, is pausing for a week of robot arm tests and checkout before pressing on to Glenelg, an area where three types of rock come together.
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Realtime coverage of U.S. EVA-19

Spacewalkers Sunita Williams and Akihiko Hoshide successfully re-installed an electrical switching unit on the space station's solar array truss Wednesday, restoring lost power to the lab complex (UPDATED). Read More...

Second spacewalk planned to finish aborted electrical work (UPDATED)

Astronauts Sunita Williams and Akihiko Hoshide will venture back outside the International Space Station Wednesday for another attempt to install a replacement power switching unit (updated timeline). Read More...

Realtime coverage of U.S. EVA-18

Engineers are assessing spacewalk repair options to free a stuck bolt and complete the installation of a power distribution box aboard the space station that derailed a spacewalk Thursday.
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NASA launches twin radiation belt satellites (UPDATED)

An Atlas 5 rocket boosted a pair of heavily shielded satellites into space early Thursday, kicking off a $686 million mission to map out the structure and behavior of the Van Allen radiation belts. Read More...

Two station astronauts set for NASA spacewalk

Space station astronauts Sunita Williams and Akihiko Hoshide are set for a spacewalk Thursday to replace a power switching unit and install power cables needed for a future Russian module. Read More...

Mars rover beams back spectacular photos of Mount Sharp

NASA's Curiosity Mars rover has beamed back stunning photos of the foothills of Mount Sharp, showing a rugged landscape marked by towering hills and gaping canyons reminiscent of the American Southwest. Read More...

Neil Armstrong, first man on the moon, dies at 82

Neil Alden Armstrong, the first man to walk on the moon and an enduring icon of the the space age for taking "one giant leap for mankind," died Saturday after complications from cardiovascular surgery. Read More...

Remembering Apollo, in Armstrong's words

On the 40th anniversary of the Apollo 11 mission, moonwalker Neil Armstrong, who passed away Saturday at the age of 82, recalled the engineering triumph that won the Cold War space race. Read More...

Stormy weather delays Atlas launch; rollback ordered (UPDATED)

A second attempt to launch an Atlas 5 rocket carrying a pair of NASA satellites was called off early Saturday because of nearby thunderstorms. Faced with a dismal forecast, NASA delayed a third try to Aug. 30. Read More...

NASA radiation belt mission delayed 24 hours (UPDATED)

Launch of an Atlas 5 rocket carrying two NASA satellites to study the Van Allen radiation belts was rescheduled for Saturday after engineers resolved an issue with tracking equipment. Read More...

Twin satellites poised for radiation belt mission

Two heavily shielded satellites set for launch early Friday will fly in tandem through Earth's energetic Van Allen radiation belts to probe their structure and how they are affected by solar storms. Read More...

Curiosity takes a spin on Mars

In a major milestone, the Curiosity Mars rover took its first baby steps Wednesday, rolling about 15 feet forward, turning and then backing up to prove the $2.5 billion science lab is, in fact, ready to rove. Read More...

After steering test, Mars rover set for initial test drive

With a broken wind sensor the only problem of any note aboard the Curiosity Mars rover, engineers planned to uplink commands overnight for an initial test drive. Read More...

Curiosity rover flexes robot arm for first time

The Curiosity Mars rover flexed its 7-foot-long robot arm for the first time Monday, moving it through a commanded series of steps to verify the basic operation of the complex appendage.
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NASA plans mission to study hidden interior of Mars

NASA plans to launch a relatively low-cost Mars lander in 2016 that will make a rocket-powered descent to the surface to study the hidden interior of the red planet. Read More...

Cosmonauts walk in space to move crane, deploy satellite (UPDATED)

Realtime coverage of Russian EVA-31. Read More...

Rover successfully test fires laser at target rock

The Curiosity rover successfully test fired a powerful laser at a nearby rock Sunday, blasting it with rapid-fire million-watt pulses to vaporize the outer layers for spectroscopic analysis. Read More...

Tentative travel plans for Mars rover unveiled

The Curiosity rover likely will spend the rest of the year working near its landing site in Gale Crater before it heads for the rugged foothills of Mount Sharp, just four-and-a-half miles, but many months, away. Read More...

Rover descent video mashup gives viewers ringisde seat

Intriguing video combines low-resolution descent video from the Curiosity Mars rover with mission control audio and a timeline of major entry, descent and landing events to give viewers a ringside seat. Read More...

Curiosity's software successfully updated; mobility tests on tap

Engineers successfully updated the Curiosity rover's computer software and plan initial tests of the mobile science lab's ability to drive across the martian terrain within the next week or so, officials said Tuesday.
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Obama congratulates Mars rover team

President Obama congratulated the Mars Science Laboratory team Monday for the successful landing of the Curiosity rover, joking that engineers should let him know ASAP if the spacecraft spots any martians. Read More...

Rover's first high-res color frames provide stunning view of Mars

Portions of the Curiosity rover's first high-resolution color panorama were unveiled Saturday, providing stunning vistas of the mountain-like walls of Gale Crater in the hazy distance. Read More...

Slow but rugged, Curiosity computer up to challenge at Mars

The electronic brain controlling NASA's Curiosity Mars rover has far less horsepower than the microchips found in a modern smart phone. But it has one big advantage: it's virtually impervious to high-energy radiation. Read More...

Curiosity prepped for software load, snaps color panorama

In a complex bit of electronic brain surgery, engineers are gearing up to flush landing software from the Curiosity rover's central computer and replace it with programming optimized for surface operations. Read More...

Small test rocket veers out of control, crashes at KSC

A small vertical-takeoff-and-landing rocket being used to test advanced technologies veered off course an instant after liftoff from the Kennedy Space Center Thursday, crashed and exploded. There were no injuries.
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Curiosity's camera mast erected as checkout continues

The Curiosity Mars rover, stepping through a complex post-landing checklist in near flawless fashion, has raised its main camera mast and beamed down razor-sharp navigation camera views of its surroundings. Read More...

Curiosity health checks good; MRO snaps descent photo

The Curiosity Mars rover survived its nail-biting plunge to a pinpoint landing on the floor of Gale Crater in remarkably good shape, engineers said Monday as tests and checkout proceeded. (UPDATED) Read More...

Mars rover lands in Gale Crater, kicking off $2.5 billion mission

In an unparalleled technological triumph, a one-ton nuclear-powered rover the size of a small car was lowered to the surface of Mars late Sunday to kick off an unprecedented $2.5 billion mission. Read More...

Curiosity on track for high-stakes descent to Mars

The Mars Science Laboratory rover closed in on its target Saturday, steadily accelerating under the increasing tug of the red planet's gravity as it streaked toward a high-stakes descent to the surface overnight Sunday. Read More...

Boeing, SpaceX, Sierra Nevada win manned spacecraft contracts

NASA announced contracts Friday totaling up to $900 million to be divvied up between three companies -- SpaceX, Boeing and Sierra Nevada -- to continue development of commercial manned spacecraft. Read More...

Russian supply ship docks with station after four-orbit chase

A Russian Progress cargo ship loaded with three tons of fuel, hardware and supplies, glided to an automated docking with the International Space Station Wednesday evening after an abbreviated four-orbit rendezvous.
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Mars Science Lab poised for trail-blazing mission

In a $2.5 billion gamble, NASA's Mars Science Laboratory rover will attempt a pinpoint landing on the red planet overnight Sunday to search for the chemical building blocks of life and signs of past or present habitability. Read More...

Curiosity relies on untried 'sky crane' for descent to Mars

NASA's Mars Science Laboratory will rely on a rocket-powered "sky crane" to lower the car-size rover to the surface, a make-or-break maneuver that solves a host of daunting technical challenges. Read More...

Mars relay sats will confirm rover's landing

During the Curiosity rover's nail-biting descent to Mars, engineers will rely on an aging NASA science satellite to relay telemetry back to Earth that will confirm success or failure in near realtime. Read More...

Progress supply ship successfully redocks with space station

An unmanned Russian Progress supply ship successfully re-docked with the International Space Station Saturday after an aborted approach last week during tests of a new rendezvous antenna.
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Japanese cargo ship reaches space station

An unmanned Japanese cargo ship carrying more than five tons of supplies and equipment was attached to the International Space Station early Friday, one week after launch from southern Japan. Read More...

Orbiter nudged back into position to cover upcoming Mars landing

A rocket firing Tuesday nudged NASA's Mars Odyssey spacecraft back into position to relay data from the $2.5 billion Mars Science Laboratory directly back to Earth during the rover's descent to the surface Aug. 3. Read More...

Progress re-docking called off after new antenna has problems

An attempt to re-dock a Russian Progress supply ship with the International Space Station was aborted by the ship's flight computer Monday night when a new rendezvous system failed to operate as expected. Read More...

Sally Ride, America's first woman in space, dies after bout with cancer

Sally Ride, the first American woman in space and an advocate for science education, died July 23 after a bout with pancreatic cancer. She was 61. Read More...

Japanese cargo ship climbs into orbit, sets off after space station

An unmanned Japanese rocket carrying more than five tons of supplies, science gear and other equipment vaulted smoothly into orbit late Friday, setting off on a weeklong flight to the International Space Station. Read More...

Soyuz docks with space station, boosts lab crew back to six

A Russian Soyuz ferry craft glided to an automated docking with the International Space Station early Tuesday, bringing three fresh crew members to the lab complex two days after launch from Kazakhstan.
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Engineers study options for realtime data during Mars landing

Problems with a NASA satellite in orbit around Mars could delay confirmation of a successful landing by the agency's Mars Science Laboratory rover, but engineers say that will have no impact on the actual descent. Read More...

Soyuz with all-veteran crew sets off after space station

A Soyuz spacecraft carrying a Russian commander, a NASA flight engineer and a Japanese astronaut -- all veteran space travelers -- blasted off late Saturday (U.S. time) and set off after the International Space Station. Read More...

Soyuz TMA-05M set for crew ferry flight to space station

Engineers are making final preparations for launch of a Russian Soyuz spacecraft early Sunday to ferry an all-veteran U.S.-Russian-Japanese crew to the International Space Station. Read More...

NASA shows off first Orion capsule with KSC ceremony

The first space-bound Orion capsule, the centerpiece of NASA's post-shuttle exploration program, was officially unveiled at NASA's Florida spaceport Monday. An unmanned test flight is planned for 2014.
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Soyuz TMA-03M brings three station fliers back to Earth (UPDATED)

Three station fliers strapped into a Soyuz ferry craft and plunged back to Earth early Sunday, landing in Kazakhstan to close out a six-month stay aboard the International Space Station.
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Delta 4 boosts secret military satellite into orbit (UPDATED)

A United Launch Alliance Delta 4 rocket, the most powerful in the post-shuttle U.S. inventory, boosted a top-secret National Reconnaissance Office spy satellite into space early Friday.
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Shenzhou 9 lands to close out successful test flight

China's Shenzhou 9 spacecraft, carrying two men and the first Chinese woman to fly in space, returned to Earth Friday after an ambitious 13-day test flight to a prototype space station module.
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Atlas 5 rocket launches classified military payload (UPDATED)

A United Launch Alliance Atlas 5 rocket carrying a classified National Reconnaissance Office satellite blasted off Wednesday, successfully boosting its secret payload into orbit. Read More...

Shenzhou 9 docks with Tiangong lab module

The Shenzhou 9 spacecraft executed an automated docking with the Tiangong 1 research module early Monday, completing China's first manned orbital linkup. Read More...

Unmanned Air Force spaceplane lands after secret mission

An unmanned Air Force spaceplane dropped out of orbit and glided to a computer-controlled California landing early Saturday to close out a classified 469-day military mission.
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China launches manned mission to dock with prototype station module

A Chinese Shenzhou spacecraft carrying a space veteran and two rookies, including China's first female "taikonaut," rocketed into orbit Saturday on a mission to dock with a prototype space station module. Read More...

NuSTAR X-ray telescope launched on mission to search for black holes

A small X-ray telescope was boosted into orbit by an air-launched Pegasus XL rocket Wednesday, the first step in an ambitious low-cost mission to study supermassive black holes and the creation of heavy elements. Read More...

Mars Science Lab rover on track for August descent to red planet

NASA's $2.5 billion Mars Science Laboratory rover is in good shape and on target for a nail-biting seven-minute plunge to a bulls-eye landing on the red planet in early August, mission managers said Monday.
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China rolls out Shenzhou-9 spacecraft for docking mission

A Chinese Long March-2F rocket carrying the Shenzhou 9 spacecraft was moved to its launching stand Saturday for work to ready the ship for launch later this month on a manned flight to dock with a prototype lab module. Read More...

Vandenberg AFB preps for X-37B landing

The Air Force is preparing to bring its unmanned X-37B spaceplane back to Earth after 15 months of clandestine military operations. Landing at Vandenberg Air Force Base, Calif., is expected sometime in the next two weeks. Read More...

SpaceX cargo ship returns to Earth to close out historic mission (UPDATED)

In the final chapter of a history-making space drama, a commercial cargo ship completed a near-flawless test flight to the International Space Station with an on-target splashdown off the Baja California peninsula Thursday. Read More...

Dragon unberthing-to-splashdown timeline

Updated Dragon unberthing-to-splashdown timeline. Read More...

Astronauts open Dragon cargo ship, float inside

Running well ahead of schedule,the International Space Station's crew opened hatches between the Harmony module and the newly arrived SpaceX Dragon cargo ship early Saturday.
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SpaceX cargo ship captured by space station (UPDATED)

In a moment of high drama on the high frontier, flight engineer Donald Pettit, operating the International Space Station's robot arm, reached out and captured a commercial cargo ship to complete a complex rendezvous. Read More...

Dragon capsule breezes through station flyby (UPDATED)

A commercial cargo ship carried out a close flyby of the International Space Station early Thursday, successfully completing a series of tests to set the stage for berthing at the lab complex Friday. Read More...

SpaceX rocket takes off on commercial flight to space station (UPDATED)

Three days after a last-second launch abort, an unmanned cargo ship bound for the International Space Station blasted off early Tuesday and streaked into orbit to kick off the first commercial flight to the lab complex.
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SpaceX gears up for second launch try Tuesday

SpaceX engineers replaced a suspect valve in an engine that triggered a last-second launch abort Saturday and cleared the company's Falcon 9 rocket and Dragon cargo capsule for a second try Tuesday. Read More...

SpaceX Falcon 9/Dragon launch-to-docking timeline (UPDATED)

Updated SpaceX Falcon 9/Dragon launch to-docking timeline (May 22 launch target). Read More...

SpaceX Falcon 9 launch aborted after last-second glitch (UPDATED)

Launch of a commercial cargo ship bound for the International Space Station was aborted at the last instant early Saturday because of trouble with an engine valve. Repairs were ordered in hopes of making a Tuesday launch. Read More...

SpaceX commercial cargo ship prepped for launch to space station

In what proponents hail as the dawn of a new era in commercial spaceflight, a SpaceX Falcon 9 rocket and Dragon cargo ship are being prepped for an inaugural flight to the International Space Station (mission preview). Read More...

Soyuz TMA-04M docks with space station, boosts lab crew back to six

A Russian Soyuz ferry craft glided to a smooth linkup with the International Space Station early Thursday, bringing three fresh crew members to the orbital lab complex. Read More...

Russian Soyuz crew ferry craft takes off on two-day flight to space station

A Russian Soyuz spacecraft carrying one of the world's most experienced space fliers, a rookie cosmonaut and a NASA shuttle veteran blasted off from Kazakhstan to kick off a two-day flight to the International Space Station. Read More...

SpaceX launch to station slips to May 19

Work to validate critical navigation and control software has forced SpaceX to again delay the maiden flight of a commercial cargo ship bound for the International Space Station. Launch is now targeted for May 19. Read More...

Atlas 5 rocket boosts military comsat into space

A United Launch Alliance Atlas 5 rocket boosted a $1.7 billion military communications satellite into orbit Friday, the second in a planned constellation of advanced jam-resistant relay stations.
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SpaceX launch to station faces delay

Launch of a commercial cargo ship bound for the International Space Station almost certainly will be delayed from May 7 to at least May 10 and possibly longer to allow time for additional pre-flight analysis, sources say. Read More...

SpaceX test fires Falcon 9 engines in prelude to May 7 station flight

SpaceX test fired the nine first stage engines powering the company's Falcon 9 rocket Monday, a key milestone before launch May 7 on the first commercial cargo flight to the International Space Station. Read More...

Station crew makes pinpoint landing in Kazakhstan

Closing out a five-and-a-half-month stay in space, a NASA astronaut and two cosmonauts undocked from the International Space Station early Friday, setting the stage for a fiery ride back to Earth.
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Planetary Resources Inc. unveils plans for asteroid mining

Planetary Resources Inc. hopes to turn science fiction into reality with plans to identify near-Earth asteroids loaded with ice, precious metals and other raw materials for eventual mining operations, company officials say.
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SpaceX delays station cargo flight for on-going data review

Launch of a commercial cargo ship making its first flight to the International Space Station is expected to slip a week or so to give engineers more time to complete pre-flight testing and analysis, officials said Monday.
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Russian Progress cargo ship launched on station resupply mission

An unmanned Russian Progress supply ship blasted off from the Baikonur Cosmodrome in Kazakhstan Friday, rocketing smoothly into orbit and setting off after the International Space Station. Read More...

Smithsonian Institution accepts delivery of shuttle Discovery

NASA officially turned the shuttle Discovery over to the Smithsonian Institution Thursday, completing the ship's transition from the world's premier manned spacecraft to the quiet confines of a museum hangar. Read More...

Shuttle Discovery heads for museum display

The space shuttle Discovery, bolted to the back of a NASA 747 jumbo jet, departed the Kennedy Space Center for the last time Tuesday, putting on a final show for thousands of Space Coast residents and tourists. Read More...

SpaceX Falcon 9 tentatively cleared for April 30 launch to space station

Pending the completion of last-minute work and a final review, a commercial cargo ship making its maiden flight to the International Space Station should be ready for launch April 30, officials said Monday. Read More...

Engineers resolve station-to-cargo module power problem

Flight controllers and the crew of the International Space Station successfully hooked up a backup power channel Saturday to route station power to a European Space Agency cargo ship, avoiding the prospect of a hurried unloading and premature undocking. (UPDATED) Read More...

Space debris forces station crew to take shelter in Soyuz capsules

The six-man crew of the International Space Station split up and briefly took shelter inside two three-seat Russian Soyuz re-entry vehicles early Saturday as a piece of space junk whizzed harmlessly past the lab complex.
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European cargo ship launched on flight to space station

An Ariane 5 rocket blasted off from Kourou, French Guiana, early Friday, boosting a European Space Agency cargo ship into orbit for a flight to the International Space Station (UPDATED).
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Atlas 5 boosts military comsat into space

An Atlas 5 rocket boosted a powerful new communications satellite into space Friday evening, the first of five planned relay stations that will act like orbital cell phone towers for military personnel around the world. Read More...

Glenn's historic mission lifted U.S. morale, kicked off space race

With the United States trailing the Soviet Union in a tense Cold War battle to win the high frontier, astronaut John Glenn stepped onto the world stage 50 years ago Feb. 20, rocketing into orbit and lifting a nation's spirits. Read More...

50 years after historic flight, Glenn sees space program at perilous crossroads

John Glenn believes the decision to retire the space shuttle before a replacement vehicle is ready to fly was a mistake that threatens to cripple America's space program. Read More...

A conversation with John Glenn

Fifty years ago, John Glenn rocketed into orbit aboard a cramped Mercury capsule, becoming one of the nation's enduring heroes. In an interview with CBS News, Glenn recalls his historic flight amid worries about the future. Read More...

Realtime coverage of Russian EVA-30

Two Russian spacewalkers moved a telescoping crane from one space station module to another Thursday, but the work proved more difficult than expected and other tasks had to be deferred. Read More...

NASA hopes to avoid major budget shortfalls in commercial space initiative

NASA managers are hopeful Congress will support the Obama administration's request for more than $800 million in 2013 to fund development of commercial manned spacecraft. The alternative, they say, is additional delay. Read More...

NASA's 2013 budget cuts Mars missions, boosts manned space initiatives

The Obama administration is requesting $17.7 billion for NASA in its fiscal 2013 budget, boosting spending for commercial manned space flight while reducing the scope of Mars exploration.
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SpaceX cargo delivery test flight slips another month to late April

Launch of the first commercial cargo ship bound for the International Space Station will slip from late March to late April at the earliest to give SpaceX engineers time to fully test complex flight software, officials say. Read More...

Russia revises Soyuz launch schedule after processng mishap

Upcoming Russian Soyuz flights to the International Space Station will be delayed in the wake of a test mishap that over pressurized and damaged the next spacecraft in the launch sequence. Read More...

Cargo ship docks with space station; Soyuz issue assessed

After a two-day orbital chase, an unmanned Russian Progress supply ship carrying 2.9 tons of supplies and equipment carried out a smooth automated docking with the International Space Station Friday evening. Read More...

Russian cargo ship takes off for space station

An unmanned Russian Progress supply ship loaded with 2.9 tons of supplies and equipment blasted off from the Baikonur Cosmodrome in Kazakhstan Wednesday, bound for the International Space Station. Read More...

SpaceX cargo launch on hold until at least late March

Launch of a SpaceX commercial cargo ship on an initial test flight to the International Space Station, originally planned for Feb. 7, is expected to slip to at least the end of March, officials said Friday Read More...

Delta 4 boosts military comsat into space

An Air Force communications satellite that will be used in part to relay commands to unmanned drones was boosted into orbit Thursday by a United Launch Alliance Delta 4 rocket (UPDATED).
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Russian space officials say ill-fated Mars probe falls to Earth

A Russian Mars probe, stranded in low-Earth orbit after a malfunction following launch in November, reportedly fell back into the atmosphere Sunday, apparently breaking up over the southern Pacific Ocean west of Chile. Read More...

Twin GRAIL spacecraft achieve lunar orbit (UPATED)

Ringing in the new year with back-to-back successes, a second NASA science satellite slipped into orbit around the moon Sunday, one day after an identical spacecraft braked into the same polar orbit. Read More...

Soyuz docks with space station; Russians investigate comsat launch failure

Amid word of yet another Russian space failure -- the fifth this year -- a Russian Soyuz ferry craft glided to a problem-free docking with the International Space Station Friday, boosting the lab's crew back to six. Read More...

Soyuz TMA-03M rockets into orbit, bound for space station

In bitterly cold weather, a Russian Soyuz rocket carrying a three-man all-veteran crew blasted off from the Baikonur Cosmodrome in Kazakhstan Wednesday and set off after the International Space Station. Read More...

Soyuz TMA-03M set for launch to boost ISS crew back to six

A Soyuz spacecraft is poised for launch Wednesday to ferry three fresh crew members to the International Space Station, boosting the lab's staff back to six. Read More...

Russians predict stranded Mars probe will fall to Earth in January

A costly Russian Mars probe, stranded in low-Earth orbit after a malfunction following launch Nov. 8, is expected to fall back into Earth's atmosphere next month, Russian officials confirmed Friday. Read More...

Budget uncertainty forces NASA to revise contracting strategy

Faced with uncertain budgets, NASA is giving up fixed-price contracts and moving back to more flexible, but less comprehensive, Space Act Agreements to continue design work on a new commercial manned spacecraft. Read More...

Paul Allen, Burt Rutan unveil new air-launch rocket system

Microsoft co-founder Paul Allen and legendary aircraft designer Burt Rutan have teamed up for a new rocket that would be carried aloft by a huge twin-fuselage mothership and launched at 30,000 feet. Read More...

SpaceX shoots for Feb. 7 launch to space station

NASA has agreed to let Space Exploration Technologies combine two test flights of the company's unmanned Dragon cargo ship into a single mission, aiming for a launch Feb. 7 to the International Space Station. Read More...

Earth-like planet in habitable zone found in Kepler data

For the first time, astronomers using NASA's Kepler space telescope have confirmed a roughly Earth-size planet orbiting a sun-like star in the habitable zone where conditions may be favorable for life as it is known on Earth.
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Atlas 5 rocket boosts Mars Science Lab toward red planet

A towering Atlas 5 rocket flashed to life and vaulted into space Saturday, putting on a spectacular show as it boosted NASA's Mars Science Laboratory rover on an eight-and-a-half-month voyage to the red planet. Read More...

Atlas rocket carrying Mars Science Lab moved to launch pad

United Launch Alliance hauled an Atlas 5 rocket carrying NASA's Mars Science Laboratory rover to the launch pad Friday for final preparations before blastoff Saturday on a showcase science mission. Read More...

Mars Science Laboratory set for Saturday launch

NASA's $2.5 billion Mars Science Laboratory rover, the most complex and scientifically powerful robotic spacecraft ever built to explore the surface of another world, is poised for launch Saturday.
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Soyuz TMA-02M brings three station crew members back to Earth

A Russian Soyuz spacecraft plunged back into the atmosphere Monday evening, carrying three space station crew members to a snowy pre-dawn landing in Kazakhstan to close out a five-and-a-half-month stay in space. Read More...

NASA Mars launch delayed one day to replace suspect battery

Launch of NASA's $2.5 billion Mars Science Laboratory rover atop a United Launch Alliance Atlas 5 rocket has been delayed one day, from Friday to Saturday, to replace a battery in the booster's self-destruct system.
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Mobile launcher moved to pad for engineering tests

A towering 355-foot-tall mobile launch tower was hauled to launch pad 39B Wednesday for structural tests and fit checks before modifications to support the agency's planned heavy-lift Space Launch System rocket.
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Soyuz TMA-22 docks with space station

A Russian Soyuz spacecraft glided to a smooth automated docking with the International Space Station early Wednesday, closing out a problem-free two-day rendezvous and boosting the lab's crew back to six. Read More...

Soyuz TMA-22 blasts off on delayed space station mission

A Russian Soyuz spacecraft carrying two cosmonauts and a NASA astronaut blasted off in blizzard-like conditions late Sunday U.S. time, kicking off a delayed flight to the International Space Station. Read More...

Progress cargo ship docks with space station

An unmanned Russian Progress cargo ship loaded with 2.9 tons of supplies and equipment completed a smooth automated docking with the International Space Station Wednesday Read More...

China launches unmanned capsule for Tiangong automated docking test

A Chinese Long March-2F rocket successfully boosted an unmanned Shenzhou capsule into orbit Monday for an automated rendezvous and docking with a prototype space station module. Read More...

Boeing leases shuttle processing facility for commercial CST-100 capsule

The Boeing Co. will process its proposed CST-100 commercial manned spacecraft in a now-vacant space shuttle processing hangar in a first-of-a-kind deal valued at up to $50 million. Read More...

Russian Progress supply ship successfully launched on space station flight

Two months after a rare Russian launch failure, an unmanned Progress cargo ship loaded with 2.9 tons of supplies and equipment bound for the International Space Station rocketed smoothly into orbit Sunday Read More...

Next-generation $1.5 billion weather satellite launched

A Delta 2 rocket blasted off from Vandenberg Air Force Base early Friday, boosting a $1.5 billion weather satellite into space to improve both short-range forecasting and understanding of long-term climate change.
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German X-ray space telescope falls back to Earth (UPDATED)

An out-of-service German space telescope apparently plunged back into the atmosphere late Saturday. Experts predicted much of its heat-resistant 1.7-ton X-ray mirror and carbon composite support structure would survive re-entry to hit the ground, but there was no immediate confirmation. Read More...

Station crew studies how microgravity affects eyesight

In the wake of recent concerns about the effects of prolonged weightlessness on vision, space station astronauts now are carrying out regular eye exams to collect more data. Read More...

SpaceX unveils innovative rocket recovery plan

SpaceX has unveiled plans to make its Falcon 9 rocket fully reusable, using the engines of the first and second stages for powered descents to vertical landings in a bid to dramatically lower launch costs. Read More...

Survey finds fewer near-Earth asteroids than previously believed

Analysis of data collected by a NASA infrared space telescope shows there are fewer near-Earth asteroids than previously believed, scientists said Thursday. But most of the nearly 20,000 bodies have yet to be detected. Read More...

China launches prototype lab module for rendezvous, docking tests

In a major milestone for China's space program, a Long March rocket successfully boosted an unmanned prototype space station module into orbit Thursday for tests of robotic rendezvous and docking systems. Read More...

NASA's UARS satellite falls to Earth (UPDATED)

NASA's UARS satellite plunged back into the atmosphere early Saturday, likely raining debris into the north Pacific Ocean. But analysts have not yet confirmed exactly when, or where, the spacecraft came down. Read More...

No comm? No problem, says Soyuz astronaut

What appeared to be a communications problem that left Russian flight controllers in the dark about the status of a Soyuz capsule descending to Earth Sept. 16 was, in fact, no problem at all, a crew member said Thursday. Read More...

Spotting UARS re-entry will require patience -- and lots of luck (UPDATED)

Amateur satellite trackers hoping to catch a glimpse of NASA's Upper Atmosphere Research Satellite when it plunges into the atmosphere Friday will need patience, clear skies and a large helping of luck, experts say. Read More...

Soyuz TMA-21 returns to Earth, suffers radio blackout but lands safely (UPDATED)

Three space station crew members returned to Earth aboard the Russian Soyuz TMA-21 crew ferry craft late Thursday, leaving three crewmates behind to await the delayed arrival of replacements. Read More...

Kepler spacecraft discovers planet orbiting binary star system

NASA's Kepler space telescope, searching for planets around distant suns, has found a Saturn-size world orbiting a pair of stars 200 light years from Earth, the first discovery of a "circumbinary" planet. Read More...

NASA unveils new super rocket for manned flights beyond Earth orbit

NASA unveiled the design of a new post-shuttle super rocket Wednesday intended to boost astronauts on flights to nearby asteroids and, eventually, Mars. If fully funded, initial test flights are expected in 2017. Read More...

NASA will evaluate ATK's Liberty rocket as possible manned launcher

NASA will evaluate ATK's proposed two-stage Liberty rocket as a possible manned launcher for future commercial flights to the space station under an unfunded Space Act Agreement, officials said Tuesday. Read More...

NASA launches dual satellite moon mission

A Delta 2 rocket blasted off Saturday and successfully boosted two NASA science satellites into space to kick off an ambitious $496 million mission to map the moon's gravity and internal structure.
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NASA tracks falling science satellite, says risk to public minimal

NASA's decommissioned Upper Atmosphere Research Satellite is expected to plunge back into Earth's atmosphere later this month, producing a shower of debris. Agency experts say risk to the public is minimal. Read More...

GRAIL moon launch delayed to Saturday (UPDATED)

Launch of a Delta 2 rocket carrying twin satellites designed to precisely map the moon's gravity has been delayed to Saturday because of high winds aloft and a potential issue with the rocket's propulsion system. Read More...

GRAIL set for launch on innovative moon mission, weather permitting

A United Launch Alliance Delta 2 rocket is on track for launch Thursday, weather permitting, to kick off a $496 million mission to precisely map the moon's gravitational field. Read More...

Station astronauts hopeful Soyuz problem resolved soon

A space station astronaut said Tuesday the Russians may be able to launch a manned Soyuz spacecraft to the lab complex by early November if an ongoing failure investigation goes well. Read More...

Lunar orbiter beams back closeup views of Apollo landing sites

NASA unveiled new closeup views of three Apollo landing sites Tuesday, clearly showing the footprints of visiting astronauts, the lower stages of the lunar landers and the tracks left behind by a dune buggy-like rover. Read More...

Opportunity rover begins 'new' mission at Endeavour crater

NASA's aging Opportunity rover is beginning what excited scientists say is a new mission exploring a 13.7-mile-wide crater that may hold unexpected clues about the ancient environment of the red planet. Read More...

Russians delay Soyuz re-entry as Progress failure probe proceeds

Russian managers have decided to briefly postpone the planned re-entry of a Soyuz ferry craft carrying three space station crew members amid work to pinpoint the cause of a Progress launch failure Aug. 24. Read More...

Shannon to review exploration options for NASA

NASA Administrator Charles Bolden has asked outgoing space shuttle Program Manager John Shannon to carry out an independent review of competing options for eventual manned missions beyond low-Earth orbit, officials say. Read More...

Manned flights to/from space station face delays in wake of Progress failure

Upcoming manned flights to and from the International Space Station are facing delays because of the Aug. 24 failure of an unmanned Soyuz carrying a Progress supply capsule, a senior NASA manager said Monday. Read More...

Unmanned Progress supply ship lost during launch to space station (UPDATED)

Russian engineers are assessing telemetry to determine the cause of an upper stage malfunction that triggered the loss of an unmanned Progress cargo ship loaded with 2.9 tons of supplies bound for the space station. Read More...

Space shuttle program officially ends Aug. 31

NASA's space shuttle program will officially end on Aug. 31, officials said Friday, less than a month and a half after Atlantis landed to close out the agency's 135th and final shuttle mission. Read More...

Curiosity Mars rover completes key pre-launch tests

NASA's $2.4 billion Mars Science Laboratory has completed an exhaustive series of functional tests to verify the car-size rover's readiness for launch in November on an eight-and-a-half-month voyage to the red planet .
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Juno launched on long voyage to Jupiter (UPDATED)

A powerful Atlas 5 rocket roared to life Friday and successfully launched NASA's Juno probe on a five-year voyage to Jupiter, the first step in a $1.1 billion mission to look for clues about the origins of the solar system. Read More...

NASA satellite spots signs of flowing salt water on Mars

A NASA spacecraft in orbit around Mars has detected signs of what appear to be seasonal flows of salty water on the surface of the red planet during warmer summer months, researchers said Thursday.
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Boeing selects Atlas 5 rockets for CST-100 test flights

Boeing will use United Launch Alliance Atlas 5 rockets for initial test flights of the company's planned CST-100 spacecraft, a manned capsule being developed as a commercial venture in a NASA competition. Read More...

Realtime coverage of Russian EVA-29

Cosmonauts Sergei Volkov and Alexander Samokutyaev launched a small amateur radio satellite during a six-hour 23-minute spacewalk Wednesday, but relocation of a large cargo crane had to be postponed. Read More...

Dawn rises on Vesta: NASA unveils spectacular photos of cratered asteroid

NASA's Dawn spacecraft, now in orbit around the asteroid Vesta, is beaming back a treasure trove of data about one of the solar system's most ancient bodies. Read More...

Juno set for launch on five-year voyage to Jupiter

NASA is readying the $1.1 billion Juno probe for launch Aug. 5 on a five-year voyage to Jupiter to kick off a challenging one-year mission to answer key questions about the formation and evolution of the solar system. Read More...

'Mission complete:' Atlantis returns to Earth, closing out final shuttle flight

The shuttle Atlantis dropped out of a moon-dappled sky and settled to a flawless landing Thursday to close out NASA's 135th and final shuttle mission, the end of an era for American manned spaceflight. (UPDATED) Read More...

Astronauts ready Atlantis for final re-entry

The crew of the shuttle Atlantis is gearing up for NASA's final shuttle re-entry and landing to close out three decades of shuttle operations. There are no technical issues and the weather appears ideal. Read More...

Weather looks good for final shuttle landing

NASA braces for the space shuttle Atlantis' historic return to Florida Thursday, bringing the iconic program to an end after three decades and 135 missions. Read More...

Astronauts test re-entry systems, pack for landing

The crew of the shuttle Atlantis, working through one of the busiest days of their mission, tested the ship's re-entry systems Wednesday and packed up for landing Thursday to close out NASA's final shuttle flight. Read More...

Shuttle Atlantis undocks from space station (UPDATED)

The crew of the shuttle Atlantis undocked from the International Space Station early Tuesday after a successful resupply mission, setting the stage for NASA's 135th and final shuttle landing Thursday. Read More...

Astronauts move cargo module to shuttle, bid station crew farewell (UPDATED)

The Atlantis astronauts moved the Raffaello cargo module back to the shuttle Monday, closing out a busy space station resupply mission. The crew then floated back aboard the orbiter to rig the ship for undocking early Tuesday. Read More...

Shuttle crew wraps up space station resupply work (UPDATED)

The Atlantis astronauts put in a final day of logistics transfer work Sunday, working through off-duty time to finish moving a last few items into the Raffaello multi-purpose logistics module for return to Earth. Read More...

Shuttle crew moves into home stretch of final shuttle mission

Working through the home stretch of NASA's final shuttle mission, the Atlantis astronauts are focusing on repacking a cargo module for return to Earth and wrapping up logistics transfers to the space station. Read More...

Flight computer restarted; CBS Radio interviews crew

Shuttle commander Christopher Ferguson successfully restarted a shuttle flight computer early Friday that failed Thursday, setting off alarms and waking the crew. The astronauts will chat with President Obama later in the day. Read More...

Cargo transfers 70 percent done; computer failure wakes astronauts

The Atlantis astronauts took a half-day off Thursday to relax and enjoy the view after a busy but productive week in space. The crew is about 70 percent complete with work to transfer cargo to and from the space station. Read More...

Shuttle astronauts focus on cargo transfers to station (UPDATED)

The Atlantis astronauts are about halfway through a busy week of supply transfers to the International Space Station. The lab's toilet is back in operation after a brief hiatus, along with the urine recycling system. Read More...

Realtime coverage of STS-135 EVA-1

Space station astronauts Michael Fossum and Ronald Garan staged a successful six-hour 31-minute spacewalk Tuesday, the final excursion of the space shuttle era. Read More...

Space station astronauts prep for spacewalk

Two space station astronauts are gearing up for a planned six-and-a-half-hour spacewalk to install experiment hardware on the lab complex and to move a failed coolant pump to the shuttle Atlantis for return to Earth. Read More...

Astronauts attach cargo module to ISS; shuttle mission extended one day

The Atlantis astronauts attached a bus-size cargo module to the International Space Station early Monday. Mission managers, meanwhile, approved a one-day mission extension to give the crew more time for logistics transfers. Read More...

Shuttle Atlantis docks with space station one last time (UPDATED)

The space shuttle Atlantis glided to a picture-perfect docking with the International Space Station Sunday, bringing more than five tons of supplies and equipment to the sprawling lab complex in the shuttle program's final visit. Read More...

Astronauts kick off heat shield inspections, docking preps

The Atlantis astronauts are working through a busy day in space, inspecting the shuttle's heat shield and gearing up for rendezvous and docking with International Space Station Sunday. Read More...

Shuttle Atlantis rockets into history as final flight begins

After a cliff-hangar countdown, the space shuttle Atlantis majestically rocketed into history Friday, putting on one last show for spectators jamming area roads and beaches to witness NASA's 135th and final shuttle launch. Read More...

Realtime coverage of STS-135 launch countdown

Despite a dismal forecast, NASA managers decided to fuel the shuttle Atlantis for a launch attempt Friday, setting the stage for the agency's 135th and final shuttle mission (UPDATED). Read More...

NASA monitors weather, preps Atlantis for Friday launch (UPDATED)

Keeping tabs on stormy weather, engineers readied the shuttle Atlantis for blastoff Friday on NASA's final shuttle flight. Engineers reviewed data Thursday to make sure no sensitive systems were affected by a lightning strike near the pad. Read More...

Shuttle forecast 70 percent 'no go' for Friday launch (UPDATED)

Forecasters are predicting a 70 percent chance of stormy weather Friday that could delay launch of the shuttle Atlantis. But NASA managers say they plan to press ahead barring a dramatic change for the worse. Read More...

STS-135 Mission Preview

The shuttle Atlantis is poised for launch Friday on the iconic program's 135th and final flight, bringing the curtain down on one of the nation's greatest technological triumphs (mission preview). Read More...

Countdown begins for final shuttle flight; stormy weather likely

Countdown clocks began ticking Tuesday for the shuttle Atlantis' launch Friday on NASA's 135th and final shuttle mission, a flight to deliver more than 8,000 pounds of supplies and equipment to the International Space Station. Read More...

Astronauts arrive for final shuttle launch

The crew of the shuttle Atlantis celebrated the July Fourth holiday Monday by flying to Florida aboard sleek T-38 jet trainers to prepare for launch Friday on the 135th and final shuttle mission.
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Space debris prompts station crew to shelter aboad Soyuz spacecraft (UPDATED)

The six-member crew of the International Space Station was told to seek shelter in two Russian Soyuz spacecraft early Tuesday because of a predicted close approach by an unknown piece of space debris.
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Progress M-11M cargo craft docks at space station

An unmanned Russian Progress cargo ship glided to a smooth automated docking with the the International Space Station Thursday, two days after launch from the Baikonur Cosmodrome in Kazakhstan. Read More...

External tank inspections proceeding smoothly, fuel valve replaced

With the Atlantis astronauts on hand for a practice countdown Thursday, engineers are making good progress with work to inspect beefed-up ribs in the shuttle's external tank and to replace a leaking main engine fuel valve. Read More...

Progress cargo ship blasts off on station resupply flight

A Russian Progress cargo ship loaded with three tons of supplies and equipment bound for the International Space Station blasted off from the Baikonur Cosmodrome Tuesday. Docking is expected Thursday. Read More...

Mark Kelly announces retirement from NASA

Astronaut Mark Kelly, commander of the shuttle Endeavour's final mission and husband of Arizona Rep. Gabrielle Giffords, gravely wounded in a January assassination attempt, will retire from NASA and the Navy on Oct. 1. Read More...

Atlantis crew flies to Florida for emergency training, practice countdown

The shuttle Atlantis' crew flew to the Kennedy Space Center Monday to review emergency procedures and participate in a dress-rehearsal countdown Thursday, a major milestone on the road to launch July 8. Read More...

Main engine fuel valve replacement no impact to 7/8 launch target

Engineers readying the shuttle Atlantis for launch July 8 plan to replace a leaking main engine fuel valve in parallel with external tank inspections next week. Read More...

Shuttle fueling test underway; engine valve issue

After a delay to assess the impact of overnight thunderstorms, engineers pressed ahead with a fueling test Wednesday to verify the integrity of structural stiffeners in the shuttle Atlantis' external tank. Read More...

X-ray telescope spots massive black holes in early universe

NASA's Chandra X-Ray Observatory satellite has detected super massive black holes in the dusty cores of numerous galaxies that formed within a billion years of the big bang birth of the universe. Read More...

NASA, Argentina launch oceanography satellite

A United Launch Alliance Delta 2 rocket carrying a sophisticated oceanography satellite blasted off Friday on a long-awaited mission to monitor the salinity of Earth's oceans. Read More...

Soyuz TMA-02M docks with space station

Monitoring a weak thruster, commander Sergei Volkov guided a Russian Soyuz spacecraft to a smooth automated docking with the International Space Station at 5:18 p.m. EDT (GMT-4) Thursday. Read More...

Voyager spacecraft shed new light on solar system boundary

NASA's twin Voyager spacecraft, approaching the edge of the solar system, have detected signs of what may be gigantic magnetic bubbles at the interface between the sun's influence and interstellar space. Read More...

NASA releases photos of shuttle Endeavour and space station

NASA has released dramatic photographs of the shuttle Endeavour docked at the International Space Station that were shot during the departure of the Russian Soyuz TMA-20 spacecraft May 23. Read More...

Soyuz TMA-02M blasts off from the Baikonur Cosmodrome

A Russian Soyuz spacecraft carrying a veteran cosmonaut, a Japanese physician-astronaut and a NASA shuttle veteran blasted off from the Baikonur Cosmodrome Tuesday, bound for the International Space Station. Read More...

Shuttle Endeavour glides to smooth Florida touchdown (UPDATED)

The shuttle Endeavour glided to a ghostly pre-dawn landing Wednesday to close out its 25th and final mission, clearing the way for NASA's last shuttle launch July 8. Read More...

Shuttle Endeavour rigged for entry; Atlantis heads for launch pad

The shuttle Endeavour's crew closed the ship's payload bay doors and geared up for re-entry and landing early Wednesday to close out the orbiter's 25th and final mission. Touchdown is expected at 2:35 a.m. EDT. Read More...

Astronauts test Endeavour's re-entry systems, prep for landing (UPDATED)

The Endeavour astronauts tested the shuttle's re-entry systems overnight Monday and began packing up for landing early Wednesday to close out the orbiter's 25th and final voyage. Read More...

Shuttle Endeavour undocks from International Space Station (UPDATED)

The shuttle Endeavour undocked from the International Space Station for the 12th and final time late Sunday, backing away for a fly-around photo survey before testing new navigation sensors and software.
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Shuttle astronauts return to Endeavour, prepare for undocking (UPDATED)

The Endeavour astronauts wrapped up last-minute transfers early Sunday, said farewell to the crew of the International Space Station and moved back aboard the shuttle to prepare the ship for undocking Sunday night. Read More...

Astronauts work on CO2 scrubber, transfers (UPDATED)

The shuttle Endeavour's crew helped out with repairs to one of the International Space Station's carbon dioxide scrubbers Saturday as NASA's next-to-last shuttle mission moved into the home stretch of a 16-day mission.
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Realtime coverage of STS-134 EVA No. 4

Astronauts Michael Fincke and Gregory Chamitoff wrapped up a xx-hour xx-minute spacewalk early Friday, completing the U.S. segment of the International Space Station after 12 years of construction. Read More...

Endeavour astronauts set for final spacewalk

The Endeavour astronauts plan to carry out a fourth and final spacewalk Friday to mount the shuttle's no-longer-needed heat shield inspection boom on the International Space Station. Read More...

Astronauts inspect heat shield; Kelly talks to Tucson media

The Endeavour astronauts carried out a final inspection of the shuttle's heat shield early Thursday, fielded questions from reporters and geared up for a fourth and final spacewalk Friday. Read More...

Realtime coverage of STS-134 EVA No. 3

Astronauts Andrew Feustel and Michael Fincke carried out a six-hour 54-minute spacewalk Wednesday, installing a robot arm mounting fixture on the space station and installing wiring for the Russian segment. Read More...

NASA selects Orion derivative for deep space missions

NASA will develop a version of the Bush administration's Orion capsule for future deep space missions beyond Earth orbit, the agency announced Tuesday. But it's not yet known when the spacecraft might fly. Read More...

Shuttle astronauts set for Wednesday spacewalk

The Endeavour astronauts helped out with space station maintenance Tuesday amid preparations for an overnight spacewalk, the third of four planned by the shuttle fliers. Read More...

Soyuz TMA-20 lands in Kazakhstan (UPDATED)

A Russian Soyuz spacecraft carrying three returning space station crew members landed in Kazakhstan Monday to wrap up a 159-day stay in space. Read More...

Shuttle crew takes time off amid Soyuz TMA-20 undocking preps

The Endeavour astronauts took the day off Monday amid preparations for the afternoon departure of three space station crew members aboard a Russian Soyuz spacecraft. Read More...

Space station change-of-command ceremony

In a brief ceremony Sunday on the eve of undocking, outgoing Expedition 27 commander Dmitry Kondratyev handed over command of the International Space Station to cosmonaut Andrey Borisenko. Read More...

Realtime coverage of STS-134 EVA No. 2

Astronauts Andrew Feustel and Michael Fincke completed an eight-hour seven-minute spacewalk at 10:12 a.m. EDT Sunday, the second of four EVAs planned by the Endeavour astronauts. Read More...

Astronauts set for second spacewalk

Astronauts Andrew Feustel and Michael Fincke are set for a planned six-and-a-half-hour spacewalk Sunday to top off the ammonia coolant in a space station solar array and to lubricate a solar array drive mechanism. Read More...

Analysis shows damaged heat shield tile no threat to re-entry (UPDATED)

Data from a "focused" inspection of a damaged heat shield tile on the belly of the shuttle Endeavour shows the orbiter can safely re-enter as is, without the need for any repairs or additional study, NASA said Saturday. Read More...

Pope Benedict XVI calls astronauts

Pope Benedict XVI called the combined shuttle-station crews from the Vatican Saturday, asking about the environment and the role of science and technology in solving global problems. Read More...

NASA orders 'focused' inspection of damaged heat shield tile

The Endeavour astronauts will use an instrumented boom on the end of the shuttle's robot arm early Saturday to make a close-up, "focused" inspection of a gouge in a heat shield tile on the belly of the orbiter. Read More...

Departing Soyuz crew to snap space station portrait

U.S. and Russian space managers have agreed to stage an out-of-this-world photo op Monday when the crew of a departing Soyuz photographs the space station and the shuttle Endeavour in a one-of-a-kind family portrait. Read More...

Shuttle Atlantis re-targeted for final launch on July 8

NASA managers have retargeted launch of the Atlantis on the 135th and final shuttle flight for around 11:40 a.m. EDT on July. Read More...

Realtime coverage of STS-134 EVA No. 1

Astronauts Andrew Feustel and Gregory Chamitoff are carrying out a planned six-and-a-half-hour spacewalk to replace space exposure experiments and to set up an ammonia coolant line for use during an EVA Sunday. Read More...

Astronauts prep for first spacewalk

Astronauts Andrew Feustel and Gregory Chamitoff are gearing up for a planned six-and-a-half-hour spacewalk, the first of four planned for the shuttle Endeavour's mission. Read More...

NASA still assessing need for 'focussed' inspection of shuttle heat shield

Engineers are continuing to assess two damage sites on the belly of the shuttle Endeavour to determine if an additional, "focused," inspection might be needed Saturday to collect more data. Read More...

Endeavour astronauts install $2 billion cosmic ray detector (UPDATED)

The $2 billion Alpha Magnetic Spectrometer was attached to the International Space Station early Thursday. Scientists say the instrument already is detecting "thousands and thousands" of cosmic ray particles. Read More...

Kelly says wife doing well after surgery

Shuttle commander Mark Kelly told reporters Thursday his wife, Arizona Rep. Gabrielle Giffords, came through surgery Wednesday in good condition as she continues her recovery from an assassination attempt in January. Read More...

NASA assesses tile damage on shuttle Endeavour's belly

Engineers are assessing several gouges and dings spotted in protective heat shield tiles on the underside of the shuttle Endeavour during final approach to the space station Wednesday. Read More...

Shuttle Endeavour docks with space station (UPDATED)

Commander Mark Kelly guided the shuttle Endeavour to a "silky smooth" docking with the International Space Station Wednesday and his crewmates successfully mounted a massive spare parts pallet on the lab's power truss. Read More...

Astronauts inspect heat shield; external tank performed well during launch

The Endeavour astronauts carried out a detailed inspection of the shuttle Endeavour's nose cap and wing leading edge panels Tuesday amid work to ready the shuttle Atlantis for launch on NASA's final shuttle flight in July. Read More...

Shuttle Endeavour rockets away on final mission (UPDATED)

The shuttle Endeavour rocketed away on its 25th and final flight Monday, putting on a spectacular, if brief, show for spectators as it knifed through a low deck of clouds and streaked into orbit. Read More...

Realtime coverage of STS-134 launch countdown (UPDATED)

Commander Mark Kelly and his five crewmates have strapped in aboard the shuttle Endeavour to await liftoff at 8:56:28 a.m. EDT. Forecasters are monitoring a deck of low clouds near the spaceport that could cause problems. Read More...

Shuttle Endeavour readied for fueling (UPDATED)

Engineers readied the shuttle Endeavour for fueling overnight Sunday, setting the stage for launch early Monday on a space station assembly mission. Forecasters continue to predict a 70 percent chance of good weather. Read More...

Shuttle Endeavour cleared for launch

NASA's Mission Management Team met Saturday and cleared the shuttle Endeavour for launch Monday on a delayed mission to deliver a $2 billion particle physics detector to the International Space Station. Read More...

Countdown begins for Monday shuttle launch

Engineers restarted the shuttle Endeavour's countdown Friday, setting the stage for launch Monday on a space station assembly flight. Forecasters continue to predict a 70 percent chance of good weather. Read More...

Endeavour astronauts return to Florida to prep for Monday launch

The Endeavour astronauts flew back to Florida Thursday to prepare for a delayed launch Monday on a space station assembly mission. Forecasters are predicting a 70 percent chance of good weather. Read More...

Shuttle Endeavour cleared for May 16 launch try

NASA managers met Monday and decided to press ahead with work to ready the shuttle Endeavour for a second launch try May 16 after extensive troubleshooting to resolve problems with hydraulic system fuel line heaters. Read More...

Missile warning satellite boosted into space

A United Launch Alliance Atlas 5 rocket successfully boosted a $1.3 billion missile early warning satellite into orbit Saturday after a picture-perfect liftoff from the Cape Canaveral Air Force Station. Read More...

Shuttle launch slips to at least May 16

The shuttle Endeavour's launch will be delayed to at least May 16, NASA officials said Friday, pending tests to confirm the health of hydraulic system electrical components that derailed an April 29 attempt. Read More...

Failure analysis indicates possible external short circuit

Engineers troubleshooting a suspect electrical distribution box removed from the shuttle Endeavour's engine compartment after a launch scrub Friday have found damage that could indicate an external short circuit. Read More...

Italian space station astronaut's mother dies

European Space Agency astronaut Paolo Nespoli, nearing the end of a long-duration stay aboard the International Space Station, is mourning the death of his 78-year-old mother, who passed away Monday near Milan, Italy, after an illness. Read More...

Shuttle launch slips to at least May 10, possibly later

Work to repair the shuttle Endeavour will delay the ship's next launch attempt to at least May 10, engineers said Monday. An official launch date is expected Friday, after repairs are complete. Read More...

Avionics swap-out ordered; shuttle launch off until at least May 8 (UPDATED)

Engineers have traced an electrical glitch that grounded the shuttle Endeavour Friday to an avionics box in the ship's engine compartment. Replacing the box will delay launch until at least May 8. Read More...

Engineers troubleshoot electrical glitch (UPDATED)

Engineers troubleshooting an electrical glitch that grounded the shuttle Endeavour Friday have verified that a cockpit fuse panel is working normally. Additional tests to narrow down the source of the problem will determine if a launch attempt Monday is possible. Read More...

Hydraulic system glitch grounds shuttle Endeavour (UPDATED)

Trouble with the shuttle Endeavour's hydraulic power system Friday forced NASA managers to delay launch on a long-awaited space station assembly mission. Read More...

Weathering storms, Endeavour fueled for launch

The shuttle Endeavour was fueled for launch Friday after weathering overnight storms that delayed countdown preparations. Forecasters are calling for a 70 percent chance of good weather for launch at 3:47:55 p.m. EDT. Read More...

Storm front slows, shuttle launch now 70 percent 'go'

NASA managers kept tabs on stormy weather approaching the Kennedy Space Center Thursday as the shuttle Endeavour is prepared for launch Friday. The forecast calls for a 70 percent chance of good weather. Read More...

Endeavour in good shape; pre-launch weather a concern

The shuttle Endeavour's countdown is ticking smoothly toward launch Friday on a space station assembly mission. Commander Mark Kelly's wife, Rep. Gabrielle Giffords, flew to Florida Wednesday to be on hand for launch. Read More...

STS-134 Mission Preview

NASA is readying the shuttle Endeavour for launch Friday on its 25th and final mission, a high-profile voyage to deliver supplies, spare parts and a $2 billion physics experiment to the International Space Station. Read More...

STS-134 countdown begins; astronauts arrive for launch

The Endeavour astronauts flew to Florida Tuesday for the start of their countdown to blastoff Friday on a high-profile space station assembly flight. Forecasters are predicting an 80 percent chance of acceptable weather. Read More...

Shuttle Endeavour cleared for April 29 launch

The shuttle Endeavour has been cleared for launch April 29 on its 25th and final mission, a four-spacewalk flight to deliver supplies, spare parts and a $2 billion particle physics detector to the International Space Station. Read More...

Boeing, SpaceX, Blue Origin, Sierra Nevada win NASA CCDev contracts

Four companies won contracts totaling $270 million Monday to continue work on commercial manned spacecraft technology that NASA hopes will result in one or more operational space taxis by around 2015. Read More...

United Space Alliance announces major workforce reduction

United Space Alliance, the space shuttle prime contractor, plans to eliminate half its remaining workforce after NASA completes its final shuttle mission this summer, company officials announced Friday. Read More...

Atlas 5 rocket takes off on secret mission

A United Launch Alliance Atlas 5 rocket blasted off from California's Vandenberg Air Force Base early Friday carrying a secret National Reconnaissance Office payload. Read More...

NASA selects museums to display space shuttles

NASA's three space shuttles will be displayed by the National Air and Space Museum near Washington, the Kennedy Space Center and the California Science Center in Los Angeles, the agency announced Tuesday. Read More...

Station crew, space officials mark Gagarin anniversary

The space station's crew joined Russian leaders, space officials and their international counterparts Tuesday to celebrate the 50th anniversary of Yuri Gagarin's trail-blazing 1961 flight to become the first human in space. Read More...

Government shutdown averted in last-minute deal

A last-minute compromise averted a looming government shutdown late Friday with agreement on a stop-gap spending bill. A vote is expected next Thursday on legislation that will fund the government through the end of the fiscal year. Read More...

NASA braces for possible government shutdown

Bracing for a potential government shutdown, NASA managers are evaluating the shuttle launch schedule and putting plans in place to continue near-normal operation of the International Space Station if a furlough is ordered. Read More...

Soyuz TMA-21 docks with space station (UPDATED)

A Russian Soyuz spacecraft carrying three fresh crew members completed a smooth, automated rendezvous and docking with the International Space Station Wednesday, bringing three fresh crew members to the lab complex. Read More...

Musk unveils plans for low-cost heavy lift rocket

SpaceX CEO Elon Musk unveiled details of a new commercial heavy lift rocket Tuesday -- the Falcon Heavy -- that he said will deliver twice the cargo to orbit at one third the cost of competing rockets. Read More...

Tracking shows no need for station crew to seek shelter aboard Soyuz (UPDATED)

Flight controllers monitoring a piece of space debris told the International Space Station's crew that radar tracking showed the odds of a collision did not warrant seeking shelter aboard a Soyuz spacecraft. Read More...

Soyuz TMA-21 roars into orbit with three bound for space station (UPDATED)

A Russian Soyuz TMA-21 spacecraft blasted off from the Baikonur Cosmodrome in Kazakhstan Monday carrying two rookie cosmonauts and a NASA shuttle veteran to the International Space Station. Read More...

Next shuttle launch delayed to April 29

The shuttle Endeavour's launch on a mission to the International Space Station has been delayed 10 days to April 29 to avoid a conflict with the arrival of an unmanned Russian Progress supply ship. Read More...

MESSENGER pictures of Mercury wow scientists

Two weeks after slipping into orbit around Mercury, NASA's MESSENGER spacecraft is beaming back a steady stream of intriguing pictures. A year-long campaign to map the planet is scheduled to begin Monday. Read More...

Kelly says 'good chance' his injured wife can attend launch

Kelly says his injured wife continues to make progress and that there's a 'pretty good chance' she will be able to attend his launch aboard the shuttle Endeavour next month. Read More...

Kelly abruptly cancels media interviews

Shuttle commander Mark Kelly abruptly pulled himself from planned pre-flight media interviews, citing a reluctance to field personal questions about his wife, Gabrielle Giffords. Read More...

MESSENGER spacecraft brakes into orbit around Mercury (UPDATED)

After a six-and-a-half-year journey, NASA's compact MESSENGER probe braked into a looping orbit around hellish Mercury Thursday, becoming the first spacecraft to take up long-term residence around the innermost planet.
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Soyuz TMA-01M returns to Earth (UPDATED)

Outgoing space station commander Scott Kelly, Soyuz TMA-01M commander Alexander Kaleri and flight engineer Oleg Skripochka undocked and returned to Earth early Wednesday, closing out a 159-day mission. Read More...

Worker killed in shuttle launch pad mishap (UPDATED)

A United Space Alliance worker was killed early Monday after a fall at launch complex 39A where the shuttle Endeavour is being readied for flight April 19. All work at the pad was suspended for the day. Read More...

Shuttle Endeavour hauled to launch pad

The shuttle Endeavour was mounted atop launch pad 39A Friday, setting the stage for launch April 19 on a four-spacewalk mission to resupply the International Space Station and deliver a $2 billion physics experiment.
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Shuttle Discovery glides to final landing (UPDATED)

The shuttle Discovery glided to a smooth touchdown Wednesday to wrap up the orbiter's 39th and final mission, a milestone marking the beginning of the end for NASA's winged rocketships. Read More...

Shuttle Discovery prepped for final landing

With windy but acceptable weather expected, the shuttle Discovery's crew is preparing the ship for its 39th and final re-entry, setting up for a Kennedy Space Center landing to close out a successful space station assembly mission. Read More...

Shuttle cleared for Wednesday landing; good weather expected

With a favorable forecast and no technical problems, NASA is gearing up to bring the shuttle Discovery back to Earth Wednesday to close out the veteran spaceplane's 39th and final flight. Read More...

Discovery astronauts reflect on veteran shuttle's final voyage

The shuttle Discovery's crew, packing up for the ship's final re-entry and landing Wednesday, said Americans should be proud of the shuttle program, but expressed concern about the lack of a near-term replacement. Read More...

Discovery crew enjoys 'live' wakeup tune; packs for re-entry

The shuttle Discovery's crew enjoyed a live wakeup call from Big Head Todd and the Monsters in mission control Tuesday before testing the ship's re-entry systems and packing up for landing Wednesday. Read More...

Shuttle Discovery undocks from space station (UPDATED)

The shuttle Discovery's crew, after a "Star Trek" wakeup call from William Shatner, undocked from the International Space Station early Monday, wrapping up an extended assembly and resupply mission. Read More...

Astronauts wrap up equipment transfers; hatches closed for undocking Monday

The Discovery astronauts completed final equipment transfers to and from the International Space Station Sunday and returned to the shuttle to rig the ship for departure early Monday to wrap up a busy resupply mission. Read More...

Astronauts service space station's air purifier, oxygen generator (UPDATED)

The Discovery astronauts and their space station counterparts, nearly finished unloading a newly attached storage module, carried out needed maintenance on the station's life support systems Saturday. Read More...

Atlas 5 rocket carrying Air Force spaceplane takes off

A United Launch Alliance Atlas 5 rocket blasted off and boosted an unmanned Air Force spaceplane toward orbit Saturday to kick off a classified military mission. It was the second flight of an X-37B spacecraft. Read More...

Astronauts continue module unpacking work (UPDATED)

The Discovery astronauts are putting in another day of work to unload the newly attached Permanent Multipurpose Module while mission planners revise the crew's timeline to reflect a second additional day docked to the lab complex. Read More...

NASA's Glory satellite lost in $424 million launch failure (UPDATED)

NASA's Glory environmental research satellite crashed into the southern Pacific Ocean Friday in a $424 million launch failure, the second in a row for the Orbital Sciences Taurus XL booster. Read More...

President Obama calls shuttle crew; mission extended another day

President Barack Obama congratulated the shuttle Discovery's crew Thursday, praising the orbiter for a "critical and iconic" final flight to the International Space Station. NASA, meanwhile, extended the shuttle's flight a second day. Read More...

Realtime coverage of STS-133 EVA No. 2

Astronauts Alvin Drew and Stephen Bowen carried out a six-hour 14-minute spacewalk Wednesday to perform a variety of maintenance chores outside the International Space Station (realtime coverage). Read More...

Astronauts prepare for second spacewalk

Astronauts Alvin Drew and Stephen Bowen plan to carry out a variety of maintenance chores outside the International Space Station during a planned 6.5-hour spacewalk. Read More...

Russians rule out Soyuz fly around of space station

Russian mission managers rejected a NASA proposal for a Soyuz fly-around of the International Space Station to capture unprecedented views of the lab complex with the shuttle Discovery and a variety of other vehicles attached. Read More...

Final U.S. module attached to space station (UPDATED)

The Discovery astronauts attached a final U.S. module to the International Space Station Tusday, providing lab crews with needed storage space. Read More...

NASA managers extend shuttle Discovery's mission by one day (UPDATED)

NASA managers Monday decided to extend the shuttle Discovery's space station resupply mission by one day to give the combined crews more time to outfit a new U.S. module and, possibly, to stage an out-of-this-world photo op. Read More...

Realtime coverage of STS-133 EVA No. 1

Astronauts Alvin Drew and Stephen Bowen completed a "textbook" six-hour 34-minute spacewalk Monday, installing a backup power cable, stowing a failed coolant pump and carrying out a variety of maintenance tasks. Read More...

Shuttle Endeavour moved to assembly building for March 10 rollout to pad

Shuttle Endeavour was hauled from its processing hangar to the Vehicle Assembly Building Monday for attachment to an external tank and solid-fuel boosters. The shuttle's 25th and final launch is targeted for April 19. Read More...

Discovery astronauts set for first spacewalk (preview)

Astronauts Alvin Drew and Stephen Bowen plan to install a backup electrical cable between two space station modules, store a failed ammonia pump module and perform general maintenance during a planned 6.5-hour spacewalk. Read More...

Discovery astronauts prep for spacewalk; heat shield in good shape

Discovery's crew worked through a busy day of robotics and equipment transfers Sunday and geared up for a spacewalk Monday. NASA's Mission Management Team, meanwhile, says the ship's heat shield appears to be in good shape. Read More...

Shuttle Discovery docks with the International Space Station (UPDATED)

The shuttle Discovery glided to a picture-perfect docking with the International Space Station Saturday, the orbiter's 13th and final linkup with the orbital outpost. Read More...

Shuttle managers assess launch debris; no damage expected

Foam debris that fell from the shuttle Discovery's external tank during launch Thursday was the result of an understood phenomenon and happened well after the timeframe when debris impacts pose a threat to the shuttle's heat shield, a senior NASA manager said Thursday. Read More...

Shuttle crew works through wing, nose cap inspections; rendezvous preps (UPDATED)

The Discovery astronauts are working through a routine but busy day in space, highlighted by inspections of the shuttle's nose cap and wing leading edge panels, along with preparations for docking with the space station Saturday (Updated at 12:40 p.m. EST). Read More...

Shuttle Discovery rockets into orbit (UPDATED)

The shuttle Discovery blasted off on its 39th and final mission Thursday, taking off with seconds to spare after a last-minute Air Force computer glitch threatened to derail the launch. Read More...

Realtime coverage of STS-133 launch countdown (UPDATED)

The shuttle Discovery's crew began strapping in shortly after 1:30 p.m. EST to await launch on the ship's 39th and final mission. There are no technical problems of any significance and forecasters expect good weather for launch at 4:50:27 p.m. Read More...

European cargo ship successfully docks with space station

The European Space Agency's second Automated Transfer Vehicle, loaded with more than seven tons of supplies and equipment, successfully docked with the International Space Station Thursday after an automated approach. Read More...

NASA managers 'go' for repaired shuttle Discovery's final launch

The shuttle Discovery is on track for blastoff Thursday on its 39th and final mission, a space station resupply flight that features two spacewalks and a final U.S. station module. Read More...

Shuttle countdown proceeding smoothly

The shuttle Discovery's countdown is proceeding smoothly toward launch Thursday on a space station resupply mission. There are no technical problems of any significance and good weather is expected. Read More...

STS-133 mission preview (UPDATED)

Running three-and-a-half months late, the repaired shuttle Discovery is poised for launch on its 39th and final mission to deliver supplies, spare parts and a final U.S. module to the International Space Station. Read More...

Shuttle Discovery's countdown begins

Engineers at the Kennedy Space Center restarted the shuttle Discovery's countdown Monday, setting the stage for launch Thursday on a long-delayed space station assembly flight. Read More...

Discovery crew flies to Florida to prep for launch

The shuttle Discovery's five-man one-woman crew flew to the Kennedy Space Center Sunday to prepare for blastoff Thursday on a space station resupply mission. Read More...

Shuttle Discovery cleared for Feb. 24 launch

Senior NASA managers attending a flight readiness review Friday at the Kennedy Space Center unanimously cleared the shuttle Discovery for launch Feb. 24 on a long-delayed space station resupply mission. Read More...

Ariane 5 rocket launches European cargo ship on station resupply mission

A powerful Ariane 5 rocket successfully boosted a European Space Agency cargo ship into orbit Wednesday on a flight to deliver more than seven tons of supplies to the International Space Station. Read More...

Realtime coverage of Russian EVA-28

Realtime coverage of Russian EVA-28 (space station maintenance; experiment installation/retrieval) Read More...

Launch of European cargo ship delayed at least 24 hours

Launch of a European Space Agency cargo ship bound for the International Space Station was delayed at least 24 hours Tuesday by a last-minute technical snag. The delay could impact the shuttle Discovery's Feb. 24 launch target.
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Stardust-NExT zooms past comet Tempel 1 (UPDATED)

NASA's Stardust-NExT spacecraft raced past comet Tempel 1 Monday in a Valentine's Day flyby to map out changes in the icy body since another spacecraft encountered the comet in 2005. Read More...

Stardust-NExT images posted

Images from NASA's Stardust-NExT spacecraft, shot as the probe streaked past comet Tempel 1 late Monday, are being posted on the Jet Propulsion Laboratory's website. Read More...

NASA unveiils FY 2012 budget

Faced with reduced funding and an uncertain outlook, NASA's $18.7 billion fiscal 2012 budget prioritizes the Obama administration's major goals and objectives but leaves unclear when post-shuttle manned spacecraft might fly. Read More...

NASA proposes Soyuz photo op; shuttle launch readiness reviewed (UPDATED)

Program managers met Friday to review the shuttle Discovery's readiness for launch Feb. 24. Russian managers have been asked to consider a Soyuz fly-around to photograph the station with the shuttle and other spacecraft attached. Read More...

Kelly rejoins Endeavour crew for April flight to space station (UPDATED)

Astronaut Mark Kelly will resume training to command the shuttle Endeavour for its final flight in April, rejoining his crewmates one month after a Tucson shooting spree that left his wife, Rep. Gabrielle Giffords, critically injured. Read More...

Kepler spacecraft detects more than 1,200 possible planets orbiting distant suns

NASA's Kepler space telescope has found more than 1,200 possible planets orbiting distant suns, including 68 roughly Earth-sized worlds, in the initial stages of a three-year project to find out how common Earth-like worlds might be. Read More...

Shuttle Discovery hauled back to launch pad after external tank repairs

With repairs to its external tank complete, engineers the shuttle Discovery was hauled back to launch pad 39A overnight Monday for work to prepare the ship for a delayed blastoff on a space station resupply mission (UPDATED). Read More...

Russian Progress supply ship docks with space station

An unmanned Russian Progress supply ship loaded with 6,000 pounds of equipment and supplies docked with the International Space Station Saturday, two days after launch from the Baikonur Cosmodrome in Kazakhstan. Read More...

Station crew captures Japanese HTV-2 cargo ship (UPDATED)

A Japanese cargo ship carrying 8,500 pounds of cargo and supplies was plucked out of open space by the International Space Station's robot arm Thursday to complete smooth automated rendezvous. Read More...

Hubble detects what may be oldest, most distant object ever seen

Astronomers using the Hubble Space Telescope have found what appears to be a small proto-galaxy 13.2 billion light years away, making it the most distant -- and oldest -- object ever detected. Read More...

Japanese HTV-2 cargo ship rockets into orbit, sets off after space station

An unmanned cargo craft carrying nearly 8.500 pounds of critical equipment and supplies blasted off from southern Japan Saturday, rocketing smoothly into orbit and setting off after the International Space Station. Read More...

Realtime coverage of Russian EVA-27

Realtime coverage of Russian EVA-27 (space station maintenance) Read More...

United Launch Alliance Delta 4 rocket boosts secret spy satellite into space

A United Launch Alliance Delta 4-Heavy, the most powerful rocket ever launched from the West Coast, blasted off from Vandenberg Air Force Base, Calif., Thursday on a classified mission to boost a spy satellite in orbit. Read More...

Bowen replaces Kopra on Discovery crew; launch still on for Feb. 24 (UPDATED)

Astronaut Stephen Bowen, a veteran spacewalker who flew on the most recent shuttle mission last May, will replace Timothy Kopra aboard the shuttle Discovery for its upcoming flight. Kopra was injured in a bicycle mishap last Saturday. Read More...

Astronaut Tim Kopra, member of next shuttle crew, injured in bike mishap

Astronaut Timothy Kopra, scheduled for launch aboard the shuttle Discovery Feb. 24, was injured Saturday in a bicycle accident, officials said. Details were not released, but officials said "there could be an impact to his mission duties." Read More...

NASA says new heavy-lift rocket not feasible with current budget, schedule (UPATED)

In a report to Congress this week, NASA said the agency's current budget does not include enough money to develop a new congressionally-mandated heavy-lift rocket and deep space exploration capsule by 2016. Read More...

Sturckow will replace Kelly in near-term training for April shuttle flight (UPDATED)

Veteran shuttle commander Frederick Sturckow will replace Mark Kelly in near-term training for an April shuttle flight, allowing Kelly to remain with wife Gabrielle Giffords as she recovers from a gunshot wound to the head. Read More...

Space Adventures plans additional trips to space station

The Russian space agency and the Rocket Space Corporation Energia have agreed to build additional Soyuz spacecraft to carry paying customers to the International Space Station starting in 2013 in a deal arranged by Space Adventures.
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NASA zeroes in on root cause of shuttle tank cracks

Engineers believe they have zeroed in on the root cause of cracks in the shuttle Discovery's external tank. A relatively simple modification should resolve the problem once and for all, officials say, setting the stage for another launch attempt Feb. 24.
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Russian prime minister calls space station, offers sympathy for Giffords shooting

Russian Prime Minister Vladimir Putin called the International Space Station Tuesday and expressed his sympathy to commander Scott Kelly over the shooting of Rep. Gabrielle Giffords, wife of Kelly's twin brother Mark. Read More...

NASA managers order 'radius block' stiffeners for all external tank stringers

NASA managers decide to install radius block stiffeners on all the structural ribs, or stringers, making up the intertank section of the shuttle Discovery's external tank to make them less susceptible to cracks during fueling and launch. Read More...

Rep. Gabrielle Giffords, wife of shuttle commander Mark Kelly, shot in Tucson

Rep. Gabrielle Giffords, D-Arizona, wife of shuttle commander Mark Kelly, was shot in the head during a public meeting in Tucson Saturday. A doctor at the University of Arizona trauma center said Giffords was expected to survive. Read More...

NASA rules out early February launch for shuttle Discovery

NASA managers Thursday ruled out an attempt to launch the shuttle Discovery in early February, giving engineers more time to assess repairs and failure scenarios in the wake of external tank cracks discovered after a Nov. 5 launch attempt. Read More...

Engineers consider beefing up all external tank 'stringers'

NASA managers order repairs for recently discovered cracks in shuttle Discovery's external tank and consider additional modifications to beef up all remaining structural ribs, or stringers, in the intertank section of the tank. Read More...

More cracks found in Discovery's external tank (UPDATED)

Engineers have found four more small cracks in the shuttle Discovery's external tank. NASA managers are considering installation of additional doublers to beef up ribs, or stringers, that experience the most stress during launch. Read More...

Discovery hauled back to VAB; tank inspections, possible modifications on tap

The shuttle Discovery was hauled off the pad and back to the Vehicle Assembly Building for additional inspections and possible external tank modifications. Launch remains on hold until at least Feb. 3. Read More...

Soyuz TMA-20 docks with International Space Station (UPDATED)

The Russian Soyuz TMA-20 spacecraft, carrying Dmitry Kondratyev, Italian flight engineer Paolo Nespoli and NASA astronaut Catherine Coleman, docked with the International Space Station Friday, boosting the lab's full-time crew back to six (UPDATED at 6:55 p.m. EST with hatch opening). Read More...

Realtime coverage of shuttle fueling test

Realtime coverage of a planned seven-and-a-half-hour fueling test to verify the structural integrity and safety margins of the shuttle Discovery's external tank (UPDATED at 3 p.m. EST; fueling test complete; no obvious problems). Read More...

Shuttle fueling test on tap Friday

The shuttle Discovery's external tank will be loaded with liquid oxygen and hydrogen rocket fuel Friday to collect data needed to assess the tank's structural integrity in the wake of cracked ribs, or stringers, found after a Nov. 5 launch attempt.
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Soyuz blasts off with three crew members bound for space station

A Russian Soyuz rocket blasted off from the Baikonur Cosmodrome in Kazakhstan Wednesday (U.S. time) carrying three crew members bound for the International Space Station. Docking is expected Friday. Read More...

NASA gears up for instrumented shuttle tanking test

NASA is gearing up for an instrumented fueling test Friday, weather permitting, to collect critical data about the structural integrity of the shuttle Discovery's external tank. After the test, the shuttle will be hauled back to the Vehicle Assembly Building for additional inspections before another launch try as early as Feb. 3. Read More...

SpaceX hails 'mind-blowingly awesome' test flight

The maiden orbital flight of the SpaceX Dragon cargo carrier met virtually all of the company's objectives, demonstrating an ability to maneuver to the International Space Station and making a pinpoint splashdown in a first for a commercial rocket program (REPOSTING original story to correct duplicate filing/time stamp problem). Read More...

SpaceX Falcon 9 set for first NASA demonstration flight

After cutting away two cracks in a second stage engine nozzle extension, SpaceX engineers late Tuesday pressed ahead with work to ready a Falcon 9 rocket for launch Wednesday on a long-awaited NASA-sponsored demonstration flight. Read More...

SpaceX test fires Falcon 9 first-stage engines in key pre-launch milestone (UPDATED)

After two last-second aborts, SpaceX test fired the first-stage engines of the company's Falcon 9 cargo rocket Saturday, setting the stage for launch next week on a NASA-sponsored demonstration flight. Read More...

Shuttle launch delayed to at least Feb. 3 for additional tests, crack analysis

Launch of shuttle Discovery on a space station resupply mission will be delayed until at least Feb. 3, NASA announced Friday, to give engineers more time to conduct tests to determine the root cause of cracks in the ship's external tank. Read More...

Root cause of shuttle external tank cracks still not clear

The root cause of unexpected cracks in the shuttle Discovery's external tank is still not understood, engineers said Thursday, a critical stumbling block for developing the necessary 'flight rationale' for another launch attempt this month. Read More...

Arsenic-eating bacteria may change definition of 'life as we know it'

Researchers discover bacteria that can substitute toxic arsenic for phosphorous in critical biomolecules. The finding suggests the definition of 'life as we know it' may need expanding to cover a broader range of possible organisms and habitats. Read More...

Realtime coverage of Soyuz TMA-19 entry and landing

Realtime coverage of the Soyuz TMA-19 entry and landing in Kazakhstan (UPATED at 11:50 PM EST with landing). Read More...

Shuttle launch delayed to at least Dec. 17

NASA managers reviewing repairs to the shuttle Discovery's external tank and the rationale for making another launch attempt decided Wednesday to delay the flight to at least Dec. 17 and possibly longer (UPDATED at 5 PM EST with news conference). Read More...

Delta 4 rocket blasts off with spy satellite

A United Launch Alliance Delta 4 rocket blasted off from the Cape Canaveral Air Force Station Sunday to boost a National Reconnaissance Office spy satellite into orbit. Read More...

Delta 4 launch scrubbed because of temperature anomalies during fueling (UPDATED)

A United Launch Alliance Delta 4 rocket carrying a classified National Reconnaissance Office payload was grounded Friday because of temperature anomalies detected during fueling (UPDATED with new launch date; problem resolution). Read More...

Shuttle Discovery's launch on hold until at least Dec. 3 (UPDATED)

Launch of the shuttle Discovery on a space station resupply mission is on hold until at least Dec. 3 to give engineers more time to assess external tank crack repairs and to develop the necessary flight rationale, NASA announced Thursday (UPDATED at 9 p.m. with management comments on 'schedule pressure'). Read More...

Tank repairs in work while shuttle engineers assess 'fight rationale'

Engineers are pressing ahead with work to repair the shuttle Discovery's external tank amid an ongoing analysis to develop "flight rationale," or technical justification, for proceeding with another launch attempt. A decision is expected Monday. Read More...

Realtime coverage of Russian EVA-26

Realtime coverage of Russian EVA-26 (space station maintenance). Read More...

Fourth crack found in external tank 'stringer' (UPDATED)

Engineers have found a fourth crack in the structural ribs, or stringers, making up the central intertank compartment between the liquid oxygen and hydrogen sections of the shuttle Discovery's external tank. Repair plans are under review (UPDATED with vent line status). Read More...

Second cracked stringer found on Discovery's external tank (UPDATED)

Engineers have discovered another crack on an adjacent stringer in the shuttle Discovery's external tank, officials say (UPDATED at 8:40 PM with NASA statement, additional details). Read More...

Leaking vent line attachment disassembled, apparent seal problem found (UPDATED)

Engineers disassembled a leaking hydrogen vent line attachment fitting on the side of Discovery's external tank overnight, revealing an unevenly compressed internal seal (UPDATED at 12:25 PM with NASA statement, new photos). Read More...

Review panel warns of $1.5 billion budget overrun in space telescope project

An independent review panel has found that miscues by NASA management threaten to add $1.5 billion to the cost of the agency's next generation space telescope, a projected overrun that is prompting a shakeup at agency headquarters. Read More...

Cracks found in 'stringer' under damaged foam; repair options assessed

Engineers removed foam insulation from the area of a crack on the side of the shuttle Discovery's external tank and found a corresponding crack in an underlying structural stringer. Troubleshooters are hopeful the damage can be fixed at the pad. Read More...

Engineers begin disassembly of leaky shuttle vent line fitting

Engineers started work Tuesday to disassemble a leaking hydrogen vent line fitting on the side of the shuttle Discovery's external tank amid troubleshooting to figure out what caused a long crack in the foam insulation of the ship's external tank (UPDATED at 9:25 PM EDT with foam dissecton). Read More...

Engineers mull shuttle repair options

Engineers geared up Monday to begin inspections and disassembly of a leaking 7-inch hydrogen vent line attached to the shuttle Discovery's external tank amid work to assess what might be needed to fix cracks in the tank's insulation. Read More...

Shuttle Discovery grounded by hyrdrogen leak; foam crack also seen

The shuttle Discovery, grounded by a gaseous hydrogen leak and a crack in fuel tank insulation, will not be ready for another launch try before Nov. 30. And that assumes engineers can carry out repairs at the launch pad. Read More...

Realtime coverage of STS-133 launch countdown

Launch of the shuttle Discovery on a space station resupply mission, the orbiter's 39th and final flight, has been delayed until at least Nov. 30 because of a hydrogen leak in a vent line. Engineers also are assessing apparent cracks in the insulation of the external tank. Read More...

NASA spacecraft flies past Comet Hartley 2, sends back spectacular photos (UPDATED)

NASA's recycled Deep Impact spacecraft flew past the nucleus of Comet Hartley 2 Thursday, beaming back spectacular pictures of its frozen, peanut-shaped nucleus and multiple jets of icy debris (UPDATED with news briefing) Read More...

Stormy weather prompts 24-hour launch delay (UPDATED)

NASA's Mission Management Team decided to delay launch of the shuttle Discovery another 24 hours, to Friday at 3:04:01 p.m., because of low clouds and rain over the Kennedy Space Center Thursday (Updated with flight plan milestones). Read More...

Shuttle Discovery cleared for Thursday launch attempt (UPDATED)

NASA's mission management team cleared the shuttle Discovery for launch Thursday, weather permitting, after concluding an electrical glitch Tuesday posed no credible safety threat. Liftoff is targeted for 3:29:43 p.m. EDT. Read More...

Engineers troubleshoot shuttle electrical glitch (UPDATED)

Engineers troubleshoot apparent glitch in shuttle engine controller circuitry; launch delayed at least 24 hours (UPDATED at 8 PM EDT with news conference). Read More...

NASA marks 10th anniversary of space station habitation

NASA marks the 10th anniversary of continuous human presence aboard the International Space Station, a milestone that was achieved early Tuesday after 57,361 orbits and 1.5 billion miles in low-Earth orbit. Read More...

STS-133 Mission Preview

The shuttle DIscovery's final voyage is a critical mission for the International Space Station as NASA retires the shuttle fleet and transitions to a new model for resupplying the lab and supporting a full-time crew of six (mission preview). Read More...

Discovery in good shape for launch; forecasters monitor weather

NASA's Mission Management Team met Monday and unanimously agreed to press ahead with plans to launch the shuttle Discovery Wednesday, weather permitting, on a space station assembly flight. Read More...

Shuttle repairs complete, NASA aims for Wednesday launch (UPDATED)

Engineers completed repairs and retest of suspect fittings in one of the shuttle Discovery's aft rocket pods Sunday, clearing the way for the start of the ship's countdown to launch Wednesday (UPDATED at 2:15 PM EDT with start of countdown). Read More...

Cosmonaut takes manual control, docks unmanned cargo ship

Cosmonaut Alexander Kaleri took over manual control to guide an unmanned Progress supply ship to a smooth docking with the International Space Station Saturday after an automated approach was called off. Read More...

Shuttle launch delayed to Wednesday (UPDATED)

Engineers have replaced suspect fittings in the shuttle Discovery's right-side orbital maneuvering system rocket pod, but testing and other work have delayed launch another day to Wednesday (UPDATED at 11:10 a.m. EDT with news briefing). Read More...

Shuttle managers optimistic about leak repair, Tuesday launch

NASA managers are optimistic leaky quick-disconnect fittings in the shuttle Discovery's right-side maneuvering system rocket pod can be repaired in time for a day-late launching Tuesday. Read More...

Engineers troubleshoot helium, nitrogen leaks in shuttle rocket pod (UPDATED)

Engineers are troubleshooting two leaks at fittings in the helium and nitrogen systems used by the shuttle Discovery's right-side orbital maneuvering system rocket pod (UPDATED at 9:20 a.m. EDT with countdown/launch delay). Read More...

Discovery astronauts fly to Florida spaceport to prepare for launch

The shuttle Discovery's crew flew to the Kennedy Space Center Thursday to prepare for launch Monday on a mission to resupply the International Space Station. Read More...

Russian Progress supply ship blasts off on space station mission (UPDATED)

An unmanned Russian Progress supply ship blasted off from the Baikonur Cosmodrome in Kazakhstan Wednesday and set off after the International Space Station. Docking is expected Saturday. Read More...

Space station debris avoidance maneuver carried out

The International Space Station's orbit was adjusted slightly early Tuesday to preclude a close encounter with an out-of-commission NASA satellite. Read More...

Repairs complete, shuttle Discovery cleared for Nov. 1 launch (UPDATED)

After reviewing weekend work to fix a small fuel leak, NASA managers attending a flight readiness review Monday cleared the shuttle Discovery for launch Nov. 1 on a space station resupply mission (UPDATED at 5:00 PM EDT with news conference; quotes and details). Read More...

Fuel line seals replaced in shuttle Discovery (UPDATED)

Engineers replaced two seals in a suspect fuel-line flange aboard the shuttle Discovery Saturday in a bid to resolve an on-again, off-gain leak and keep the ship on track for launch Nov. 1 on a space station resupply mission. Read More...

NASA managers optimistic seal replacement will eliminate shuttle fuel leak

Engineers drain propellant from the shuttle Discovery's maneuvering rocket system before beginning weekend work to replace seals in a suspect flange (UPDATED at 7:30 AM 10/22/10 with fuel offload). Read More...

Discovery crew reviews emergency procedures, straps in for practice countdown

The shuttle Discovery's crew strapped in for a dress-rehearsal countdown Friday that sets the stage for launch Nov. 1 on a space station assembly mission. It will be Discovery's 39th and final flight. Read More...

President Obama signs NASA budget authorization

President Obama signed NASA's budget authorization Monday, setting the stage for debate on funding details during a 'tough' appropriations process. Read More...

SpaceShipTwo makes first gliding free flight (UPDATED)

In a long-awaited milestone, Virgin Galactic's commercial sub-orbital rocketplane, the VSS Enterprise, completed its first piloted glide-to-landing test flight Sunday in California (Updated at 6:30 PM EDT with Branson interview). Read More...

Soyuz TMA-01M docks with International Space Station (UPDATED)

A Soyuz spacecraft carrying two Russian cosmonauts and a veteran shuttle commander docked with the International Space Station Saturday evening after a two-day orbital chase, boosting the lab's crew back to six. Read More...

Realtime coverage of Soyuz TMA-01M launch

Realtime coverage of the Soyuz TMA-01M launch from the Baikonur Cosmodrome in Kazakhstan (Updated at 7:35 p.m. EDT with Soyuz launch). Read More...

Soyuz TMA-01M spacecraft moved to launch pad (UPDATED)

The Soyuz TMA-01M spacecraft was moved to the launch pad for for liftoff Thursday evening (U.S. time) from the Baikonur Cosmodrome in Kazakhstan (posting countdown and launch-to-docking timeline). Read More...

Former shuttle program manager says 2011 budget proposal sets NASA up for failure

Former shuttle Program Manager Wayne Hale says the proposed NASA budget approved by Congress Wednesday falls short and will not pay for the programs the agency is being asked to deliver. Read More...

STS-134, ATV-2 launch dates modified

The European Space Agency has rescheduled the launch of an unmanned space station cargo ship for Feb. 15, setting up a docking Feb. 26. NASA, in turn, has delayed launch of the shuttle Endeavour by one day to Feb. 27. Read More...

House passes Senate version of 2011 NASA funding bill (UPDATED)

The House of Representatives voted late Wednesday to approve the Senate version of NASA's fiscal 2011 budget proposal, which would kick start development of new heavy lift rockets, fund an additional shuttle flight and support new commercial launchers. Read More...

External tank for February shuttle flight arrives at KSC

The external tank that will be used by the shuttle Endeavour in February -- the last tank that will be delivered to the Kennedy Space Center -- was off loaded from its transport barge Tuesday and moved into the Vehicle Assembly Building. Read More...

Realtime coverage of Soyuz TMA-18 entry and landing

Realtime coverage of Soyuz TMA-18 entry and landing in Kazakhstan (updated 09/27 with on-site landing pictures) Read More...

Change of command ceremony sets stage for Soyuz landing Friday

Expedition 24 commander Alexander Skvortsov handed over control of the International Space Station to Douglas Wheelock Wednesday in a ceremony that sets the stage for the return to Earth of Skvortsov and two crewmates early Friday.
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Shuttle Discovery hauled to launch pad for final flight (UPDATED)

The shuttle Discovery was hauled to the launch pad overnight Monday for work to ready the ship for blastoff Nov. 1 on a space station resupply flight, its 39th and final mission. Read More...

Boeing, Space Adventures announce plans for commercial space launch

Space Adventures Ltd. will work with Boeing to launch wealthy tourists and other non-NASA fliers aboard a capsule under development by the U.S. aerospace giant. Read More...

Final shuttle crew named for possible station flight

NASA names four astronauts to train for a possible rescue mission aboard the shuttle Atlantis to back up the crew of a February mission. If funding is approved, NASA hopes to launch Atlantis on an actual space station resupply fight. Read More...

Progress cargo ship docks with International Space Station

An unmanned Russian Progress supply ship carrying two-and-a-half tons of supplies and equipment docked with the International Space Station early Sunday after a smooth automated rendezvous. Read More...

Engineers troubleshoot shuttle/external tank attachment problem (UPDATED)

The shuttle Discovery's attachment to its external fuel tank was temporarily put on hold Friday pending troubleshooting to resolve problems with a mis-aligned nut. Read More...

Progress supply ship launched to space station (UPDATED)

An unmanned Russian Progress supply ship carrying more than 5,000 pounds of supplies and equipment was launched from the Baikonur Cosmodrome Friday. Docking with the International Space Station is expected early Sunday. Read More...

Space Shuttle Discovery, facing final flight, moved to VAB (UPDATED)

The shuttle Discovery was hauled to the Vehicle Assembly Building Thursday for attachment to an external tank and boosters. If all goes well, the orbiter will be hauled to launch pad 39A Sept. 20 for blastoff Nov. 1 on its final mission.
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Possible June shuttle flight could be 'in limbo' until end of year

NASA shuttle managers are keeping options open while awaiting a decision, possibly as late as the end of the year or early January, on whether to mount an additional shuttle flight next June. Read More...

Follow-up ISS spacewalk tasks deferred to November shuttle mission

Assessing follow-up work needed in the wake of a coolant pump replacement aboard the International Space Station, NASA managers decided this week to defer additional spacewalk tasks to the crew of a November shuttle flight. Read More...

ATK test fires five-segment booster in Utah

ATK Aerospace Systems successfully test fires a five-segment solid-fuel booster near Promontory, Utah, as part of the Constellation moon program the Obama administration wants to cancel. Read More...

$2 billion space station particle detector delivered to Kennedy Space Center

A $2 billion physics experiment bound for the International Space Station was delivered to the Kennedy Space Center Thursday after a busy summer of work to replace the magnet at the heart of the powerful particle detector. Read More...

NASA spacecraft finds multi-planet solar system

NASA's Kepler spacecraft has found its first confirmed multi-planet solar system, including two Saturn-class worlds and a possible low-mass planet just slightly larger than Earth. The announcement follows a European discovery, using a different technique, of a solar system with up to seven planets. Read More...

Multi-planet solar system may include near Earth-size world

Astronomers discover a solar system 127 light years away with up to seven planets, including one world just a bit larger than Earth. If confirmed, this would be the least massive extra-solar planet yet found. Read More...

On Mars, satisfaction awaits Curiosity rover

NASA's $2.4 billion Mars Science Laboratory rover -- Curiosity -- is the most sophisticated unmanned lander ever built, a robot scientists hope will revolutionize humanity's understanding of the red planet (CNET repost). Read More...

How the Curiosity rover will land on Mars

In a high-speed computer-orchestrated descent jokingly referred to as "six minutes of terror," NASA's newest Mars rover will rely on a rocket-powered "sky crane" to lower the car-size robot to the surface (CNET repost). Read More...

The Mars science gear on Curiosity

Loaded with sophisticated instruments and a nuclear power pack immune to sunlight-dimming dust, NASA's Curiosity rover will search for carbon compounds and geologic clues about the habitability of the red planet (CNET repost). Read More...

NASA considering June 28, 2011, for possible rescue/resupply shuttle flight

If NASA wins political approval for one additional space shuttle mission, the agency is protectively considering a June 28, 2011, target launch date. Read More...

Station coolant loop back on line; astronauts discuss repair work

The International Space Station's coolant system is back up and running normally after a three-spacewalk repair job. The lab's U.S. astronauts discussed the repair work in an interview with CBS News. Read More...

Study suggests astronauts need better exercise

A new study shows that astronauts on long-duration spaceflights experience significant muscle wasting and a surprising loss of force, suggesting new exercise techniques are needed to keep crews fit. Read More...

Astronauts wrap up successful repair EVA (UPDATED)

Astronauts Douglas Wheelock and Tracy Caldwell Dyson wrap up a seven-hour 20-minute spacewalk to install a replacement coolant pump aboard the International Space Station. Read More...

Realtime Coverage of U.S. EVA-17

Realtime coverage of U.S. EVA-17 (loop A ammonia pump R & R part 3) Read More...

Astronauts cleared for third coolant system repair EVA

Astronauts Douglas Wheelock and Tracy Caldwell Dyson prepare for a third spacewalk Monday to install a replacement ammonia pump in a bid to complete coolant system repairs. Read More...

Advanced EHF comsat launched

A United Launch Alliance Atlas 5 rocket boosted the first Advanced Extremely High Frequency military comsat into orbit Saturday. Read More...

Third coolant repair EVA on tap Monday; fourth EVA likely

NASA delays third coolant repair spacewalk to Monday; officials say fourth spacewalk likely to tie up loose ends and move faulty ammonia pump to more secure stowage location. Read More...

Realtime Coverage of U.S. EVA-16

Realtime coverage of U.S. EVA-16 (loop A ammonia pump R & R part 2) Read More...

Astronauts cleared for second ISS repair spacewalk

NASA managers have approved plans for a second spacewalk Wednesday to isolate a leaking ammonia line, allowing astronauts to remove a faulty pump module crippling the lab's coolant system. A third spacewalk will be needed Sunday to complete the repair. Read More...

NASA revises plan for second ISS repair spacewalk

NASA planners are revising plans for a second ISS coolant system repair spacewalk Wednesday to deal with an unexpected ammonia leak. A third spacewalk is expected Sunday, pending management approval, to finish the job. Read More...

Ammonia leak, jammed connector derail coolant repair spacewalk

An unexpected ammonia leak and a jammed quick-disconnect fitting derailed plans to swap out a faulty pump module aboard the International Space Station during a spacewalk Saturday. Read More...

Realtime Coverage of U.S. EVA-15

Realtime coverage of U.S. EVA-15 (loop A ammonia pump R & R part 1) Read More...

Astronauts set for pump replacement spacewalk

Astronauts Douglas Wheelock and Tracy Caldwell Dyson make final preparations for a spacewalk Saturday to replace a coolant pump on the International Space Station. Read More...

NASA looks for source of debris found in ET feedline

Engineers are looking into how a metal washer made it into an external tank liquid oxygen feedline. Read More...

Spacewalks delayed to Saturday, Wednesday

NASA managers decided Thursday to delay two upcoming space station coolant system repair spacewalks to improve planning and procedures. The EVAs now are targeted for Saturday and Wednesday. Read More...

Preliminary timeline for pump replacement spacewalk (EVA-1)

Here is a preliminary timeline for a planned spacewalk Friday to replace a failed ammonia pump module in the International Space Station's cooling system. Read More...

NASA refines spacewalk plans for cooling pump changeout (UPDATED)

NASA astronauts and engineers are refining plans for two spacewalks to replace a large ammonia pump module that shut down Saturday, knocking out one of the lab's two cooling loops. Read More...

Coolant problem triggers powerdowns aboard ISS (UPDATED)

Space station astronauts, flight controllers troubleshoot cooling system problem. Read More...

NASA hopes for contact with silent Spirit rover

NASA warns “a miracle” may be needed to restore the Spirit Mars rover to even limited operation. Read More...

Station controllers monitor threatening Fengyun 1C debris (UPDATED)

After multiple radar tracking passes, space station flight controllers concluded a piece of debris from a deliberately destroyed Chinese satellite would not pass close enough to require any crew action. Read More...

Realtime coverage of Russian EVA-25

Realtime coverage of Russian EVA-25 Read More...

Cosmonauts gear up for spacewalk

Cosmonauts Mikhail Kornienko and Fyodor Yurchikhin are gearing up for a planned six-hour spacewalk overnight Monday. Read More...

House committee joins Senate in proposing additional shuttle flight

A House committee, reviewing its version of NASA's $19 billion 2011 funding package, approved an amendment calling for an additional shuttle flight next summer to deliver supplies and equipment to the International Space Station.
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Tank for last planned shuttle flight heads to KSC

The external tank for the final planned shuttle mission was rolled out of Lockheed Martin's Michoud Assembly Facility Thursday to begin the 900-mile voyage to the Kennedy Space Center. Read More...

Shuttle contractor plans October layoffs

Shuttle prime contractor United Space Alliance plans to lay off about 15 percent of its 8,100-strong space shuttle workforce Oct. 1, company officials announced Tuesday.
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Progress 38 successfully docks with ISS

An unmanned Russian supply ship successfully docked with the International Space Station Sunday, two days after an interference issue with a television transmitter in a backup docking system triggered an unexpected abort Friday. Read More...

Interference blamed for Progress docking abort (UPDATED 7/4/10)

Russian engineers believe electrical interference caused an approaching unmanned Progress supply ship to abort its approach to the International Space Station Friday Read More...

Progress docking aborted

The automated approach of an unmanned Russian Progress supply ship to the International Space Station was aborted today when telemetry between the spacecraft and the Russian command module was lost. (UPDATED) Read More...

Shuttle launch dates reset

NASA managers Thursday formally retargeted the program's final two missions for launches Nov. 1 and Feb. 26. Read More...

Progress supply ship launched to station

An unmanned Russian Progress supply ship was successfully launched Wednesday from the Baikonur Cosmodrome in Kazakhstan. Read More...

Soyuz TMA-19 moved to new Russian port

Cosmonaut Fyodor Yurchikhin, flight engineer Shannon Walker and Douglas Wheelock strapped into the Soyuz TMA-19 spacecraft that carried them into orbit earlier this month, undocked from the Zvezda command module's aft port and redocked at the new Russian Rassvet module.
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NASA assesses shuttle launch dates

NASA managers Tuesday asked shuttle engineers to assess retargeting the final two space shuttle missions, moving launch of a mid-September flight with Discovery to Oct. 29 and a late November flight by Endeavour to Feb. 28. The changes would give engineers more time to optimize payloads bound for the International Space Station and avoid launch conflicts with other flights to the lab complex. Read More...

Soyuz TMA-19 docks with space station

Completing a two-day orbital rendezvous, a Russian Soyuz spacecraft carrying a veteran cosmonaut and two NASA astronauts docked with the International Space Station's aft port Thursday, boosting the lab's crew back to six.
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Soyuz TMA-19 blasts off

Lighting up the pre-dawn Kazakhstan sky, a Russian Soyuz rocket carrying a veteran Russian cosmonaut and two NASA astronauts roared to life and vaulted into orbit Tuesday, kicking off a two-day flight to the International Space Station.
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SpaceX launches initial Falcon 9

Powered by 10 engines and the vision of an internet entrepreneur, an untried Falcon 9 rocket blasted off Friday and successfully boosted a dummy payload into orbit on a maiden voyage intended to help pave the way for commercial missions to the International Space Station.
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Falcon 9 countdown aborted

Running two-and-a-half hours late because of technical problems and a sailboat in the launch danger zone, SpaceX attempted to launch its new Falcon 9 rocket on its maiden flight Friday, but the countdown was interrupted with less than five seconds to go by an unspecified problem.
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Falcon 9 set for maiden launch

Downplaying expectations, the founder of SpaceX, one of the companies NASA is counting on to help resupply the International Space Station after the shuttle's retirement, said Thursday he believes the maiden flight of the new Falcon 9 rocket Friday has a 70 percent to 80 percent chance of succeeding.
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Soyuz TMA-17 lands in Kazakhstan

The Soyuz TMA-17 crew capsule, carrying outgoing space station commander Oleg Kotov, Timothy Creamer and Soichi Noguchi, settled to a safe parachute-and-rocket-assisted landing in Kazakhstan Tuesday after a descent from the International Space Station.
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Soyuz TMA-17 undocks from station

The Russian Soyuz TMA-17 spacecraft, carrying outgoing Expedition 23 commander Oleg Kotov, Timothy Creamer and Soichi Noguchi, undocked from the International Space Station Tuesday evening, setting the stage for landing in Kazakhstan to close out a five-and-a-half-month mission.
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Kotov, Creamer, Noguchi prepare for landing

Outgoing space station commander Oleg Kotov, NASA flight engineer Timothy Creamer and Japanese astronaut Soichi Noguchi floated into their Soyuz TMA-17 spacecraft Tuesday afternoon, closed the hatch and readied the ship for for undocking and landing in Kazakhstan to close out a 163-day stay in space.
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Shuttle Atlantis returns to Earth

The shuttle Atlantis closed out its 32nd and final planned mission with a smooth Florida landing Wednesday, wrapping up a quarter century of service with a successful space station assembly mission.
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Shuttle cargo bay doors closed

After resolving an issue with the shuttle's re-entry cooling system, the Atlantis astronauts closed the ship's payload bay doors just before 5:30 a.m. EDT. The crew is setting up for a deorbit rocket firing around 7:42 a.m. and a landing at the Kennedy Space Center at 8:48 a.m.
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Atlantis crew preps for entry

Keeping tabs on the weather, the Atlantis astronauts are preparing for re-entry and landing today at the Kennedy Space Center to close out the shuttle's 32nd and final flight.
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Armstrong, Cernan question shift to commercial launch ops

Apollo 17 commander Eugene Cernan, the last man on the moon, told lawmakers Wednesday the Obama administration's plan to shift near-term manned spaceflight from NASA to private industry could result in a 10-year gap between the end of the shuttle program and the debut of reliable commercial rockets. Read More...