NASA on Wednesday delayed a scheduled spacewalk from the International Space Station (ISS) just hours before two astronauts were due exit the orbiting laboratory.

NASA is considering a rare early return of its crew from the International Space Station over an unspecified medical issue involving one of the astronauts, after cancelling a planned spacewalk that ha...

NASA says the ailing astronaut is stable and while it is not an emergency, weeks more in space are not in the best interest of their health.