Pluto
Pluto was discovered in 1930. Pluto has a very large moon called "Charon." It is almost half the size of Pluto. It was discovered in 1978. For Pluto to make a full rotation, it takes 6.4 Earth days. Pluto was named by an eleven year old girl. In 1930, Venetia Burney of Oxford, England, Suggested to her grandfather that the new discovery was named after the Roman god of the underworld. He forwarded the name to the Lowell Observatory and the name was selected.