Leroy Chiao, who was a NASA commander on the International Space Station, had a near-collision with UFOs in August.

Suni Williams and Butch Wilmore won't be back on Earth before March, but they've got candy canes and Santa hats to celebrate ...

Smart undershirts and AI algorithms will help keep astronauts healthy on NASA's planned Lunar Gateway moon-orbiting space ...

Explorers, astronauts and filmmakers described life in space and on Earth in an epic livestream from the Drake Passage.

Space station crews spend the holidays away from family and friends, but that doesn’t stop them from celebrating in space.

Pictures from the International Space Station do not disappoint, from comets and northern lights to giant hurricanes and ...

Astronauts Butch Wilmore and Sunita Williams brought Christmas cheer to the ISS, donning Santa hats despite being stranded in ...

NASA astronauts Suni Williams, Don Pettit, Nick Hague, and Butch Wilmore shared a holiday greeting to those back home on ...

The American astronauts will also have the day off to talk with loved ones, although they will still have to keep up with ...

NASA astronauts aboard the International Space Station shared a special Christmas holiday message for everyone back on Earth.

Stranded NASA astronaut Sunita "Suni" Williams has followers scratching their heads over a festive new photo that shows the space travelers getting into the holiday spirit lightyears away from earth.