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== Moon Orbit ==
[[File:MoonOrbitIllustration.jpg|150px|right|NASA Theory: The moon orbits the earth]]
===The Moon's path===
[[File:NASA moon rotation.gif|right|200px|Tidal locked: NASA's explanation of why the side of the moon we see never changes]]▼
According to [[NASA]], the Moon orbits Earth in the prograde direction and completes one revolution relative to the Vernal Equinox and the stars in about 27.32 days (a tropical month and sidereal month) and one revolution relative to the Sun in about 29.53 days (a synodic month). Earth and the Moon orbit about their barycentre (common centre of mass), which lies about 4,670 km (2,900 mi) from Earth's centre (about 73% of its radius), forming a satellite system called the Earth–Moon system.
===Tidal locked===
▲[[File:NASA moon rotation.gif|right|200px|Tidal locked: NASA's explanation of why the side of the moon we see never changes]]
The reason why the moon doesn't appear to rotate (Assuming [[NASA's]] statement that the moon is an orbiting body), the Moon is "Tidally locked", which is where a moon possesses a "synchronous rotation", and takes just as long to rotate around its own axis as it does to revolve around its the earth. Hence the same side of the Moon always faces the Earth, although there is some variability because the Moon's orbit is not perfectly circular.
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