Our solar system is made up of the Sun and everything that orbits around it, including eight planets. Mercury, Venus, Earth, and Mars are the inner, terrestrial planets closest to the Sun. The outer planets are gas giants - Jupiter, Saturn, Uranus and Neptune - and they are much larger than the inner planets. Pluto, formerly the ninth planet, is now classified as a dwarf planet along with several other small icy bodies that orbit beyond Neptune in the Kuiper Belt.
