A planned spacewalk outside the International Space Station was scrapped because of what NASA called a "medical concern" with an unidentified crew member.

Credit: NASA NASA will host a live news conference at 5 p.m. EST on Thursday from the agency's headquarters in Washington to discuss the

There may be more water on the moon than previously believed, and it could be used as a resource during upcoming missions -- like NASA's return of humans to the lunar surface through the Artemis program. The two studies published in the journal Nature ...

NASA hosts a live news conference on the postponed spacewalk after a crew member faces a medical concern.