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NASA's Dawn Spacecraft Says Goodbye to Giant Asteroid VestaThe probe is on its way to the even-bigger space rock Ceres.
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Strange Star in Nearby Cluster Resists AgingA star in the Messier 4 globular cluster appears to hold the secret of eternal youth.
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Disintegrating Alien Planet Has Comet-Like TailThe planet may be completely gone within 100 million years or so.
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Twin Moon-Mapping Space Probes Begin Extended MissionThe Grail probes are designed to map the lunar gravitational field in unprecedented detail.
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Astronauts to Take Extra Spacewalk Wednesday for Space Station FixSpace station astronauts Sunita Williams and Akihiko Hoshide will venture outside for the second time in six days.
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Astronauts Heading Deep Underground for Spaceflight TrainingThe six astronauts will enter a Sardinian cave system on Friday.
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Jupiter-Bound Probe Changes Orbit in Deep SpaceAnother engine burn for Juno is planned this coming Tuesday.
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Ghostly Night-Shining Clouds Get Their Glow from Meteor SmokeNoctilucent clouds have puzzled scientists since they were first seen in the late 19th century.
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Milky Way 'Haze' May Be Dark Matter SignatureResearchers have been looking for proof of dark matter for decades.
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Gorgeous Cosmic 'Superbubble' Observed by X-Ray Space TelescopeThis superbubble represents empty space carved out from exploding supernovas.
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Blue Moon Wows Observers Around the World (Photos)Amazing photos of the Aug. 31, 2012 blue moon were captured by skywatchers all over Earth.
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Mars Rover Curiosity Begins 1st Long Martian DriveCuriosity will be on the move for a while.
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Space Sugar Discovered Around Sun-Like StarAstronomers found molecules of a simple form of sugar, known as glycolaldehyde, around a young star.
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Eureka! 'Light Bulb' Solar Storm Erupts from Active SunThe rounded coronal mass ejection was released by the sun on Aug. 20, 2012.
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NASA Captures Amazing View of Tropical Storm Isaac at Night (Photos)Before it grew into Hurricane Isaac, the tropical storm still looked fearsome in a NASA nighttime view.
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Patrick Stewart Warps Into 'Futurama' Wednesday NightThe "Star Trek" alum plays a character called the Huntmaster.
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Stunning Hubble Telescope 'Hidden Treasures' Revealed in Photo ContestSome gorgeous cosmic images have been languishing in Hubble's archive, until now.
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NASA to Broadcast 1st Song from Mars TuesdayRapper will.i.am has written a song called 'Reach for the Stars' that will premiere from space.
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NASA's Moonwalking Apollo Astronauts: Where Are They Now?A look at the 18 men who flew on manned moon landing missions.
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NASA Holds Mars Rover Update Today: How to Watch OnlineThe Mars rover Curiosity update begins at 5 p.m. EDT.
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Neil Armstrong, First Man to Walk on Moon, Dies at 82Commander of Apollo 11 and the first man to walk on the moon has died.
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First Milky Way Galaxy 'Twins' FoundThe two newfound galaxies are spirals with two large companion galaxies, just like our own Milky Way.
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Giant Dying Star Caught Devouring Alien PlanetThe red giant star offers a preview of Earth's own demise by the sun.
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NASA Renews Caltech Contract to Oversee Jet Propulsion LaboratoryThe university has operated JPL since 1958.
