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...