Here's what scientists have now learned about the DART mission.
Planetary defense has moved from science fiction to a live engineering problem, and the stakes could not be higher. The central question is no longer whether an asteroid will eventually head our way ...
Smile! A spacecraft just caught you — and everyone else on our planet — on camera while snapping a selfie. Our planet shines in the distance roughly 26.5 million miles (43 million km) away from ...