Two NASA astronauts saw their weeks long mission turn into months and now one of them is responding to tabloid claims about ...

The agency’s top medical official was responding to rumors that Suni Williams had lost an unusual amount of weight during an ...

"All NASA astronauts aboard the International Space Station are in good health," says the agency's chief health and medical ...

In a video released Monday by NASA, stranded astronaut Sunita Williams, 59, offered a surprising reason for her weight loss ...

Trump could grant a rare waiver exempting Musk from those laws, a move that has been politically unpopular in the past.

NASA and Russia at odds over cause and severity of the International Space Station's leak risks, including possibility of ...

"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 ...

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

Sunita Williams clarifies her health status, denying weight loss but detailing body changes from space fluid shifts. Read her ...

The project involved simulating a flight beyond low-Earth orbit, including the effects of long-term isolation with restricted communication and expedition resources ...