Comets are the tiny points of light found moving in the sky. A comet is a mixture of solid matter combined with gases; however, their origin is still a mystery. Comets upon coming in contact with the Sun, give rise to a tail. This tail is composed of fine particles and gases which are shot off from the nucleus of the comet, under the influence of the Sun’s heat. The nucleus of the comet is called coma, a glowing cloud of gases. When a comet approaches the Sun, its head faces towards it and when it moves away from the Sun, it goes tail first, followed by head.