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For questions pertaining to natural satellites, such as our own Moon.

Moons are small bodies that orbit a planet. A planet can have anywhere from zero to many moons, and they can be of varying sizes, though they are typically relatively small. Each moon is affected by the planet and the planet is affected by each moon, and the moons will affect each other as well One example is Epimetheus and Janus, which exchange orbits about every four years.