The Earth is four and a half billion years old, so why they started appearing then is unknown, as is the mechanism to make ...

A 66-foot asteroid exploded over Chelyabinsk, Russia in 2013 with a flash brighter than the Sun, but the shockwave arrived about 90 seconds later, smashing windows and injuring roughly 1,500 people.

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of ...

A gas giant planet called WD 1856b, orbiting the burned-out core of a dead, sun-like star. And in a new study published today ...