It would be the first time humans have traveled beyond low Earth orbit since the days of Apollo. The mission would be manned and financed by two private, anonymous customers.

(Image credit: SpaceX)

Astronomers have discovered a solar system full of potentially habitable planets. Lulu Garcia-Navarro talks to Seth Shostak of the SETI Institute, which searches for extraterrestrial intelligence.

The annular solar eclipse, which will leave just a sliver of sun shining behind the moon, will be visible from the southern hemisphere Sunday. Here's how to watch, even if you're outside its path.

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Scientists recently published a paper explaining why some meteors create strange sounds. NPR's Scott Simon talks with researcher Bill Sweatt about what creates this "sizzling" sound.

Trained as a neuroscientist, Eric Haseltine always asks questions. He's identified four concepts that lead to scientific breakthrough. One of them: acknowledging we're not the center of the universe.

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NASA had originally planned for the Dragon craft to reach the space station three days ago. It's carrying crew supplies and a range of scientific experiments.

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For the first African-American woman in space, her path to spaceflight and beyond includes trying to pave the way for more girls of color to follow in her footsteps.

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Some of the planets could be home to liquid water, but it remains unclear whether life could exist on such strange worlds.

(Image credit: NASA/JPL-Caltech)

The capsule called Columbia hasn't left the Smithsonian's National Air and Space Museum in Washington, D.C., since 1976. It's heading out on tour to celebrate the 50th anniversary of the moon landing.

(Image credit: Dane Penland/National Air and Space Museum/Smithsonian Institution)

The private spaceflight company launched its Falcon 9 rocket on Sunday, only to have the rocket's cargo capsule encounter an error in its navigation system on Wednesday during a docking attempt.

(Image credit: NASA/AP)

SpaceX scrubbed a launch attempt Saturday at NASA's Launch Complex 39A, site of the shuttle program and the mission that first sent humans to the moon. Their second try succeeded Sunday.

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Covered in ice and filled with bubbling lava, the Antarctic volcano Mount Erebus is the perfect proxy for an alien world. That's why NASA's Aaron Curtis travels there to test space exploration robots.

Even astronauts have to go number two. NASA recently asked the public for suggestions on how to better deal with poop in spacesuits.

Astronomers think there's an undiscovered planet lurking in the far reaches of the solar system, and they're asking the public's help to find it.

(Image credit: NASA/JPL-Caltech)

Launch Complex 39A, the site of the Apollo 11 mission, has quite a storied past. Now, it's on the brink of a new era — but it'll have to wait a bit, after Saturday's launch was scrubbed for 24 hours.

(Image credit: Bruce Weaver/AFP/Getty Images)