Comets

Comets are stars which has tail like structure. The word Comet derived from Greek i.e., hair of the head. Comet is a composition of dust, water ice, rock, ammonia, carbon monoxide, methane and carbon dioxide. Even comets are called as “dirty snowballs”. The dust particles in the comet are seemed as tail when we seeing. When the comets moves in high speed range, the dust particles are left behind. Hence the formation of tail like structure appeared. In solar system collisions appeared drastically between comets and planet or moon. In ancient history, these comets are seen as bad luck for kings. They thought that the king would die if the comet appears.