Moon

The moon (latin:luna) is Earth's only natural satellite and the fifth largest satellite in the solar system.The average centre-to-centre distance from the Earth to the Moon is 384,403 km, about thirty times the diameter of the Earth. The common centre of mass of the system (the barycentre) is located about 1,700 km—a quarter the Earth's radius—beneath the surface of the Earth. The moon takes a complete orbit around the Earth in 27.3 days.