The system is believed to be traveling at least 1.2 million miles per hour (1.93 million kilometers per hour), according to a ...

A program developed by APL is helping U.S. space agencies protect satellites and other systems vital to national security.

Astronomers may have discovered a scrawny star bolting through the middle of our galaxy with a planet in tow. If confirmed, ...

NASA's Europa Clipper mission has launched to study Jupiter's icy moon Europa, which may harbor a potentially habitable ocean ...