Comets

If your death-from-above musings focus solely on asteroids, you need to broaden your mind. Comets pose a serious risk as well, researchers say.

The Rosetta probe drifted down to the surface of Comet 67P today (Sept. 30) and ended its 12-year mission.

Europe's Rosetta spacecraft has captured dramatic imagery of a comet outburst that may have been caused by a landslide on the icy body.

If Comet Swift-Tuttle smacked into Earth, it would likely be a very bad day for our planet.

Skywatcher Chris Schur was able to glimpse Comet Linear 252P with his naked eye just after capturing it on camera. The image was taken from Payson, Arizona on the morning of April 2.

A new kind of comet that is nearly tailless has been discovered — and the surprises don't stop there. It may even reveal clues about the building blocks of Earth.

A Neptune-size planet with a giant plume of gas streaming behind it like a comet's tail has been discovered by astronomers, and is the first such planet ever discovered.