It looks and behaves like a comet, and all evidence points to it being a comet. But this one came from outside the solar ...

Key Points - NASA's X-43A hypersonic research vehicle, part of the "Hyper-X" program, still holds the world record for an air-breathing aircraft, achieving a speed of Mach 9.64 (6,363 mph) in its ...

Whoops. NASA accidentally sent commands to Voyager 2 that cut off communications with the probe by pointing its antenna the wrong way. The satellite is programmed to reset its orientation multiple ...