The Solar System consists of the Sun and objects that orbit around it, including planets, comets, and asteroids. The Earth and other planets move in elliptical orbits around the Sun. The largest objects orbiting the Sun are called planets, most of which have moons orbiting them. There are eight major planets and three dwarf planets that make up the Solar System. The four inner terrestrial planets closest to the Sun - Mercury, Venus, Earth, and Mars - have rocky surfaces, while the outer gas giants - Jupiter, Saturn, Uranus, and Neptune - are mostly made of gas. An asteroid belt lies between Mars and Jupiter, and the Kuiper Belt beyond Neptune contains many comets, asteroids and dwarf