Tidal locking of the Moon with the Earth

Tidal locking of the Moon with the Earth

Tidal locking results in the Moon rotating about its axis in about the same time it takes to orbit Earth. Except for libration effects, this results in the Moon keeping the same face turned toward Earth, as seen in the figure on the left. (The Moon is shown in polar view, and is not drawn to scale.) If the Moon were not rotating at all, it would alternately show its near and far sides to Earth, while moving around Earth in orbit, as shown in the figure on the right. By Stigmatella aurantiacaOwn work, CC BY-SA 3.0, Link

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