Deep space sounds like birdsong, astronomers have found. Random bursts of radiation have been observed about 100,000 miles away from Earth, almost halfway to the Moon, and when translated into ...

Boom Supersonic's XB-1 demonstrator craft will break the sound barrier for the first time during a Jan. 28 test flight, and you can watch the action live.

This is one of the few true audio-like recordings from space: the sound caused by the Stardust spacecraft passing through the dust of comet Tempel 1, pinging the robot's body with debris.