"Exposure to the space environment leads to changes related to inflammation, muscle wasting," and more, NASA said.

Amid public concern, NASA said the Starliner astronauts and the other five spacefarers living in orbit "undergo routine ...

NASA has denied rumors that two of its astronauts are losing weight on the ISS, saying they are in outstanding health.

"In 65 years of human spaceflight, we've never had to bring somebody back for a medical reason so far," he added. "That's a ...

The U.S. Navy is unleashing its monstrous Kraken device on NASA, allowing the space agency to use the dizzying machine for an ...

Astronaut Sunita Williams clears up health speculations regarding her body changes on the ISS. Learn how NASA ensures astronaut well-being and Williams' commitment to her mission in space.

In March, three NASA astronauts were sent to the International Space Station to monitor the arrival of two rockets over six ...

Suni Williams and Butch Wilmore, the two NASA astronauts who have been stuck at the International Space Station for more than ...

NASA astronauts Suni Williams and Butch Wilmore say they are working out aboard the International Space Station as they await ...

Three NASA astronauts whose prolonged space mission ended with a trip to the hospital last month won't say which one of them ...

Two astronauts are doing well despite rumors of health issues as they wait to return to Earth, the astronauts and NASA say.

NASA astronauts can vote from space, but why can't they endorse political candidates? As it turns out, U.S. federal law ...