A clock aboard a fast-moving spacecraft does not break, lag or malfunction. It ticks normally for everyone inside. Hearts ...

On Earth, people grip objects to ensure they don't fall. In space, this process changes: When astronauts hold an object without moving it and then let go, the object doesn't fall because there is no ...

Volunteer astronomers sifting through infrared images from a retired NASA telescope have spotted a faint object racing through space at roughly 1 million miles per hour, fast enough to eventually ...