Our solar system officially has nine planets and one star: the Sun. In order from the Sun out, the planets are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. The discovery of an object larger than Pluto in 2005 rekindled the debate over whether such objects, belonging to the "Kuiper Belt" -- a collection of icy bodies located beyond Neptune-- should be called planets. Pluto itself belongs to the Kuiper Belt.