The Moon is the only organic satellite of Earth. The distance from Earth is about 384,400km with a diameter of 3476km and a mass of 7.35*1022kg. By way of history it has had lots of names: Named Luna by the Romans, Selene and Artemis by the Greeks. And of course, has been recognized through prehistoric times. It is the second brightest object in the sky just after the Sun. Due to its size and composition, the Moon is in some cases classified as a terrestrial “planet” along with Mercury, Venus, Earth and Mars.
Origin of the Moon