Astronauts on China's Tiangong station used artificial photosynthesis to turn CO₂ and water into oxygen and rocket fuel.

NASA astronauts Suni Williams and Butch Wilmore completed a spacewalk Thursday while awaiting their delayed return to Earth.

Astronauts Butch Wilmore and Suni Williams are conducting a spacewalk outside the International Space Station to remove ...

Starliner co-pilot Sunita Williams is now the world's most experienced female spacewalker, moving up to number four overall.

Astronaut Suni Williams said she's trying to remember what it's like to walk after being stuck in space for almost seven ...

A NASA astronaut reveals that after eight months in space, she lost the ability to perform basic tasks such as walking or ...

The astronauts on the Shenzhou-19 mission at Tiangong Space Station used semiconductor catalysts to convert carbon dioxide ...

Breathing New Air Chinese astronauts claim to have created rocket fuel on board the country's Tiangong space station using a ...

So the return of Suni Williams and Butch Wilmore has never been a political story—until this week. And it's a good thing that ...

Nicole Stott is the latest astronaut to lend her autograph to the Space Hipsters Signature Edition series of "signed" patches ...

NASA astronaut Sunita “Suni” Williams, one of the two astronauts on an unintentionally extended stay aboard the International Space Station, now holds the record for total spacewalk time by a woman.

Astronauts on board China's "heavenly palace" space station have demonstrated a new way of making rocket fuel products and ...