Settling in aboard the International Space Station for a marathon 342-day stay in orbit, astronaut Scott Kelly says he's taking life in space "one day at a time," adding he plans to work at a slightly slower pace to maintain an even keel. Read More...

A workhorse Soyuz booster thundered to life and climbed into a dark Kazakh sky Friday, carrying NASA astronaut Scott Kelly and cosmonaut Mikhail Kornienko on a four-orbit voyage to the International Space Station to kick off a marathon 342-day mission, the longest flight ever attempted by an American.
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Shuttle veteran Scott Kelly first heard about NASA's plans to send an astronaut to the International Space Station for nearly a full year shortly after he completed his third space flight in 2011, a 159-day stay aboard the orbital lab complex.
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After an extended review, NASA has opted to forego capturing a small asteroid as an interim step on the road to sending astronauts to Mars. Instead, the agency will focus on robotically plucking a sizable boulder from the surface of an asteroid and returning it to the vicinity of the moon. Read More...

A United Launch Alliance Delta 4 rocket thundered away from Cape Canaveral Wednesday, boosting the ninth in a series of upgraded Global Positioning System navigation satellites into orbit.
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NASA launched four satellites in a $1.1 billion mission to study the high-speed interactions between Earth's magnetic field and the sun's to learn more about the mechanisms responsible for the titanic energy discharges that drive auroras and play havoc with satellite navigation, communications and power grids.
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Taking space station resupply to new heights, Lockheed Martin unveiled plans for an innovative modular spacecraft Thursday that could be used to deliver cargo to the lab complex or serve as a small habitat for NASA astronauts making deep space voyages aboard the agency's Orion capsules.
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NASA's Hubble Space Telescope, monitoring subtle shifts in auroras flickering around Jupiter's moon Ganymede, has confirmed the presence of a deep salt-water ocean 95 miles below the icy crust of the solar system's largest moon, scientists said Thursday.
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Three space station fliers -- the outgoing NASA commander and two Russian cosmonauts -- undocked and returned to Earth Wednesday, ending a 167-day stay in space with a nail-biting communications blackout that left the crew out of contact with Russian flight controllers during much of the trip home.
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Locked down in a massive test stand, an upgraded five-segment solid-fuel booster thundered to life in Utah Wednesday in a spectacular test firing, generating 3.6 million pounds of thrust during a two-minute "burn" that generated a 5,000-degree torrent of flame and a towering plume of exhaust visible for miles around.
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NASA's Dawn spacecraft slipped into orbit around the dwarf planet Ceres Friday, setting the stage for unprecedented close-range observations of the largest body in the asteroid belt between Mars and Jupiter, an enigmatic world featuring heavily cratered terrain, smooth plains and mysterious bright spots.
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Engineers are running tests to pinpoint an apparent short circuit somewhere in the complex electronics aboard NASA's Curiosity Mars rover that triggered fault protection software and interrupted robot arm science operations last week, officials said Wednesday.
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NASA's Dawn spacecraft is closing in on the dwarf planet Ceres, the largest body in the asteroid belt between Mars and Jupiter, beaming back increasingly sharp pictures revealing a heavily cratered world with unexpected -- and so far, mystifying -- spots of light that may be reflections off exposed ice or some other material.
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By the light of the waxing moon, a SpaceX Falcon 9 rocket roared to life Sunday night and boosted a pair of Boeing-built communications satellites into orbit, the first commercial relay stations featuring all-electric propulsion to save weight and dramatically lower launch costs.
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Astronauts Terry Virts and space station commander Barry "Butch" Wilmore ventured back outside Sunday for their third spacewalk in eight days to complete initial preparations for upcoming dockings by Boeing and SpaceX crew capsules.
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