Mars, a planet once capable of sustaining liquid water and harboring flowing rivers, today stands as a frozen desert. For ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...

NASA has discovered an interstellar comet that's wandered into our backyard. The space agency spotted the object with the sky ...

The company held the first test deployment of its solar arrays designed to power solar-electric propulsion systems for the Gateway space station.