The closest look ever at a new comet will happen when the mountain-size comet Siding Spring buzzes past Mars this weekend.
Declaring that "failure is not an option," Alyssa Carson wants to go further than any human has gone before. She's already been to NASA's Space Academy three times.
NASA's looking for innovative ways to get a manned crew safely to the Red Planet. Could deep sleep hold the key to success?
Get a head start on building your very own 1970s-style Mars orbiter by snapping up an engine built for NASA's Viking project.
After two years of exploration and driving, NASA's Curiosity rover has finally reached the base of Mount Sharp, a major goal of the mission.
The glamour of science without the work! It's your chance to control a Mars rover, but on an alien world and for a possibly shady scientific organization. Season 1 is completed (and free).
NASA aims to correct a series of problems with the Opportunity rover's memory by giving it a reformat from far, far away.
Space-alien theorists have gotten a thrill from a bone-like object found on Mars, but NASA has a more plausible explanation.
NASA announces the payload for its next Mars rover and it's set to be even more sophisticated than the highly successful Curiosity mission.
The extraterrestrial robot rolls 25 miles across the Red Planet, breaking a more than 40-year-old record for off-Earth mileage.
The founder of the private space transport company gives a short timeline for the possibility of firing up a self-sustaining city on the Red Planet.
Get a rare perspective on the Curiosity rover's travels across a distant planet with a fascinating image snapped by NASA's Mars orbiter.
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