Comets

The Comet Hyakutake

Comets are dirty balls of ice and dust that form in the outer solar system. They usually have an elliptical or oval orbit. When They get close to the sun their gases start melting and streaming behind them in a beautiful tail that glows brightly. Comets are believed to come from a region beyond Pluto called the Oort Cloud. Comets are believed to have brought water to Earth in the form of ice on comets.