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Earth will pass through a trail of comet debris on Friday night (May 23), perhaps setting up a meteor shower of epic proportions. But experts aren't sure just what skywatchers will see....

Material blasted off Mars from meteor impacts may have scarred the surface of Phobos, one of the Red Planet's two tiny moons, a new study suggests....

Astronomers using the NASA/ESA Hubble Space Telescope have captured the images in this amazing space wallpaper showing the dancing auroral lights at Saturn’s north pole. ...

NASA is enlisting amateur astronomers to hunt for killer space rocks. The space agency announced Wednesday (May 21) that it has signed a deal with the online observatory Slooh to get citizen scientists to track asteroids....

An unmanned Atlas 5 rocket will launch a classified spy satellite payload for the U.S. National Reconnaissance Office at 9:05 a.m. EDT (1405 GMT) from Cape Canaveral Air Force Station. ...

See launch photos for the May 22, 2014 launch of an Atlas 5 rocket carrying the classified NROL-33 satellite in this Space.com gallery. The United Launch Alliance launched the mission for the U.S. National Reconnaissance Office....

A 36-year-old space probe that NASA once thought might be returned from space to be put into the Smithsonian may instead soon resume its original mission thanks a private group's attempt to reawaken the satellite....

NASA's Interface Region Imaging Spectrograph (IRIS) captured close-ups of plasma falling back and exploding away from the surface. ...

The private spaceflight company SpaceX is building a giant rocket called the Falcon Heavy. See images of the planned Falcon Heavy heavy-lift booster in this Space.com gallery....

Space.com shadowed a group of students from the University of California, San Diego who were selected by NASA to test an experiment onboard a zero-gravity flight....

Star cluster NGC 3590 resides in the largest single segment of the Milky Way's spiral arms that can be seen from our position in the galaxy. Exploring this cluster reveals properties of our galaxies spiral disc....

The new photo, taken by a telescope in Chile, shows NGC 3590, a small cluster containing several dozen stars that lies about 7,500 light-years from Earth in the constellation Carina (The Keel)....

NASA's InSight Mars lander, which is scheduled to launch toward the Red Planet in 2016, passed a key design review Friday (May 16), clearing the way for construction of the spacecraft to begin....

Space.com shadowed a group of students from the University of California, San Diego who were selected by NASA to test an experiment on board a zero-gravity flight....

The director, on the set of the upcoming sequel in Abu Dhabi, makes the announcement as part of UNICEF initiative called "Force For Change". Find out more at www.omaze.com/starwars....

The image, a compilation of exposures taken by NASA's Opportunity rover on April 18, provides a great look at the 14-mile-wide (22 kilometers) Endeavour Crater, which Opportunity has been exploring since August 2011....

Astronomers have several ways to count stars, but getting a definitive answer to how many there are in a galaxy is "surprisingly difficult."...

The Special Purpose Dexterous Manipulator (SPDM) aka Dextre, will replace a faulty camera near the elbow of its attached robotic arm. This will be the first self-repair conducted by the the robot. ...

An astronaut examines the protective material on his Mercury capsule. ...

The most massive and luminous stars were long suspected to die in explosive deaths, and astronomers now have the most direct evidence yet that these cosmic behemoths go out with a bang....