When people picture space, they often imagine endless black emptiness dotted with planets and stars. But new research shows that the region surrounding our solar system is far from empty. Instead, it ...

NASA's recent budget request doesn't offer hope for a leading X-ray astronomy spacecraft. Scientists are pretty worried.

“We should have started shouting back in 1947,” says Radio Astronomer Charles Seeger. “But we didn’t know then what we had hold of.” Anxious to make up for this omission, the University of California ...

The Hubble Space Telescope has exited safe mode after a gyroscope glitch, NASA says, and should resume its regular science operations sometime in January.