Elon Musk's SpaceX on Wednesday pushed back its latest orbital flight test of Starship, the colossal prototype rocket the company hopes will help humans colonize Mars. "Due to weather, we're now ...

Sunita Williams and crew celebrated Christmas on the International Space Station. A SpaceX Dragon capsule delivered supplies, including gifts. The crew enjoyed special meals and connected with family.

Jeffrey Kluger is an editor at large at TIME. He covers space, climate, and science. He is the author of 12 books, including Apollo 13, which served as the basis for the 1995 film, and was ...