The 12 recognised planets are: Mercury, Venus, Earth, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Charon and 2003 UB313 (provisional name). There are eight "classical planets": Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Ceres is a planet, but because it is smaller than Mercury, one may describe it as a "dwarf planet". A new category of planet is now defined: "plutons". Pluto (the prototype for this classification), Charon, and 2003 UB313 fall into the growing category of planets called "plutons".