Watch astronauts hold their own Summer Olympics in space with zero-g synchronized swimming and more

Astro Restoration Project pieces together space shuttle astronomy payload

Northrop Grumman will launch a Cygnus cargo ship to the space station today. Here's how to watch live.

'They want people to take them seriously': Space Force wary of taking over UFO mission. The newest branch is among a number of military and intelligence organizations in the running to take over the investigation of unexplained aircraft.