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Spot Mars in the Night Sky Before It DisappearsMars will be visible low in the western sky shortly after sunset.
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Leaky Valve on Space Station Delays SpacewalkThe suspect valve stalled two cosmonauts from starting a 6.5-hour maintenance spacewalk.
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Pew! Pew! Pew! NASA's Curiosity Rover Zaps Mars Rock with LaserThe Curiosity rover fired 30 laser shots in 10 seconds to zap a rock on Mars.
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Stunning Photo Reveals Colliding Star Clusters Seen by Hubble TelescopeThe clusters are located about 170,000 light-years away.
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Helium Spotted in Moon's Wispy AtmosphereThe results confirm observations made 40 years ago on the lunar surface.
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Cosmic Photo Smokes Out Stars Inside Pipe NebulaThe Pipe nebula is a dark patch of space with some new stars forming.
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Skydiver's Record-Breaking 'Space Jump' Delayed by Damaged CapsuleThe "Space Jump" attempt is now aimed for some time in early October.
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Super-Fast Sun Eruption Spotted by NASA SpacecraftThe coronal mass ejection traveled between 1,800 and 2,200 miles per second.
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Giant Plasma Loop on Sun is Half a Million Miles LongA NASA spacecraft spotted the huge solar filament on the sun.
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Mars Rover Curiosity Snaps Hi-Res Color Views of Red PlanetScientists pieced the 79 pictures into a mosaic.
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Mars Surface Made of Shifting Plates Like Earth, Study SuggestsPlate tectonics could make Mars a better candidate to host life than researchers had thought.
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Largest Map of Universe Yet Captures 1 Million GalaxiesThe map could help crack the mystery of dark energy and dark matter.
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Amazing Video Captures Magical-Looking Sun StormA pinkish-purple filament snakes between two massive sunspots.
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Wow! Mars Rover Landing Spotted by Orbiting SpacecraftThe spectacular photo shows the Mars rover Curiosity landing under its parachute.
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NASA Awards $1.1 Billion in Support for 3 Private Space TaxisThe selected companies are Sierra Nevada, Boeing and SpaceX.
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New NASA Mars Rover is a Red Planet Mini-Truck, Ford SaysA side-by-side comparison reveals some similarities between NASA's new Mars rover and Ford's truck.
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NASA to Broadcast Mars Rover Landing From NYC's Times Square Sunday NightThe live NASA broadcast of the Curiosity rover's arrival at Mars will be screened on a giant TV in Manhattan.
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Cosmic Rays Still Mysterious 100 Years After DiscoveryA high-altitude balloon flight revealed the existence of cosmic rays on Aug. 7, 1912.
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Unmanned Russian Cargo Ship Departs Space StationA robotic Russian cargo ship big farewell to the International Space Station.
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China Tests Powerful Rocket Engine for New BoosterThe new engine will be integrated into China's planned Long March 5 rocket.
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Less Than a Week Remains Before NASA's Biggest Rover Yet Lands on MarsNASA's Curiosity rover will touch down on the Red Planet on the night of Aug. 5.
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Spiral Galaxy Photo Sheds New Light on Recent Star ExplosionThe supernova remnant may host a spinning pulsar, the photo suggests.
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NASA X-Ray Mirror Idea Inspired by Scotch Tape (No, Really!)Tightly rolled reflective tape could create big — and relatively inexpensive — telescope mirrors.
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Russia to Re-Try Space Station Docking Test SaturdayAn unmanned cargo ship will attempt to link up with the space station again using an upgraded docking system.
