For the first time in five years, the international space station changed course on Wednesday to avoid a piece of space junk — in this case, satellite debris that the Russians have insisted wasn't there.

The glowing Crab Nebula, a spectacular and colorful object famously imaged by the Hubble Space Telescope, represents the leftovers from a supernova explosion observed by Chinese and Arab astronomers in 1054 C.E.

NASA engineers successfully freed a stuck metal pin on the space shuttle Atlantis late Tuesday, but the work delayed plans to roll the spacecraft out to its Florida launch pad this week.

A virus designed to swipe passwords from online gamers has inexplicably popped up in some laptop computers aboard the international space station.

Astronomers say fresh imagery of a powerful collision of galaxy clusters supports the idea that dark matter is something totally separate from ordinary matter.