The two long-lived NASA robots were the first truly mobile Mars explorers.
This week, NASA made a formal request for private companies to propose future lunar technologies, with responses due by the end of next month.
Come 2023, NASA will have a new eye tracking the heavens and looking to solve some of the greatest scientific mysteries we know of.
NASA has officially stopped trying to contact its Opportunity rover on Mars, but before the robot went silent, it claimed a dramatic record: farthest distance driven on another planetary body.
NASA's InSight Mars lander has successfully deployed its final instrument, a heat probe nicknamed the "mole" for its plan to burrow into the Martian regolith.
SpaceX's Mars ships won't be ferrying just the super rich to and from the Red Planet, if everything goes according to Elon Musk's plan.
Scientists couldn't find the pattern in these strange clouds of quantum fireworks. So they enlisted a computer, and it noticed a hidden turtle.
NASA is launching a new research partnership to tackle the search for life beyond Earth, including life that may look very different from the kinds we're familiar with.
And for the first time, physicists have recorded the wild drum beats rippling from the magnetic poles.
Spirit and Opportunity, the Mars rovers, have done groundbreaking science on the surface of the Red Planet. Take a look at some of their latest Mars photos.
Radioactive metal might help explain why Earth and its sibling worlds are not ocean planets hostile to life as we know it, a new study finds.
Former NASA astronaut Mark Kelly announced that he is running for a seat in the U.S. Senate seat in Arizona.
Earth's shadow and the Belt of Venus loom above the horizon behind the Roque de los Muchachos Observatory on La Palma in this panorama by astrophotographer Chirag Upreti.
The Chang'e-4 lander and rover entered sleep mode Monday in preparation for a second lunar nighttime on the far side of the moon.
The brilliant, blue-green comet C/2018 Y1 Iwamoto will zip by Earth this week, and the speedy space "snowball" is currently visible in the night sky with binoculars and small telescopes.
The company that was to finance Mars One has been liquidated, dealing a severe setback to the venture’s quixotic goals of one-way human missions to Mars.
Hard on the heels of the discovery of a potential massive impact crater deep under the Greenland ice sheet, scientists think they may have found yet another such structure nearby.