The agency hasn't said which astronaut is affected by the medical issue.

NASA is preparing to send astronauts to the moon as early as next month, which will include Canadian Space Agency's Jeremy ...

Two NASA astronauts were scheduled to complete a six-and-a-half-hour spacewalk on January 8, but the agency has postponed it indefinitely ...

NASA has postponed a planned Jan. 8 spacewalk outside the International Space Station due to a "medical concern" with an ...

Buzz Aldrin, the second man and only one of 12 to ever walk on the moon, turns 96 today. He's just one of four living ...

Crew-11 was expected to splash down off the coast of California early Thursday.

As NASA prepares to bring Crew-11 home early, here's a look at other medical issues or space emergencies that NASA has ...

The four astronauts aboard on the SpaceX Crew-11 mission have returned to Earth safely, after their stay on the ISS was cut ...