Comets

Comets are cosmic snowballs of frozen gases, rock and dust roughly the size of a small town. When a comet's orbit brings it close to the sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the sun for millions of kilometers.

~NASA Solar System Exploration

Comets:


 * [|Comets](S.M)
 * [|Halley's Comet](J.L)
 * [|Comet Facts] (T.S)