A comet is a celestial object that is made mostly of rock, but also contains ice, gas, and dust. It travels along a random path, guided by the gravitational pull of nearby planets and stars. As a comet approaches the sun, the heat causes the ice to vaporize, creating a glowing "head" called a coma. The pressure from the solar wind pushes the gas and dust away from the coma, forming a long, glowing tail that always points away from the sun. This tail can be visible from Earth and is a characteristic feature of comets. Comets often originate from the outer regions of the solar system, such as the Kuiper Belt or the Oort Cloud, and periodically enter the inner solar system on highly elliptical orbits.
