Astronauts may be exposed to the equivalent of 120 chest X-rays over 3 months. As two NASA astronauts gear up for a months-long unplanned stay on the International Space Station (ISS), they may also ...

The Artemis II mission, which could launch as early as February, is expected to send four astronauts on a trip to the moon, ...

Stranded US astronauts Butch Wilmore and Suni Williams are scheduled to fly back to Earth on Tuesday — ending their extended, nine-month stay in space. The NASA astronauts, who were originally ...

NASA will announce the next group of astronaut candidates selected from more than 8,000 applications. Coverage will be available on the agency's streaming app, NASA+ – also available on YouTube and ...

The NASA Artemis II mission, set to lift off as soon as February, will mark the first time astronauts have aimed to venture beyond near-Earth orbit since 1972.

Four astronauts are gearing up to launch to the International Space Station on Wednesday. Their arrival will, at long last, kick off the process of bringing NASA astronauts Suni Williams and Butch ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. NASA has announced ...

Humans haven’t traveled to the moon since NASA’s Apollo program ended in 1972, but the Artemis program will soon return humans to the lunar surface, with the first crewed landing currently slated for ...

Editor's note:Click here to watch the Starliner astronauts return to Earth. The NASA astronauts who crewed the Boeing Starliner could be on their way home a little sooner than expected. Weather ...

Astronauts visiting the International Space Station (ISS) typically spend about six months there before returning to Earth, ...