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This article is about moons in general. For Earth's moon, see the Moon.
File:Moon.jpg
earth's moon
A moon , natural satellite or luna is an astronomical object that is found in orbit around a planet. Some moons, like Voga, are planetoids brought into orbit around a planet by the planet's gravity, while others, like the Moon, are of uncertain origin (DW: Revenge of the Cybermen, Doctor Who and the Silurians).