Is its rotation on its own axis so perfectly synchronized to how it rotates around the earth? I imagine even a fraction of a degree off will eventually cause a part of the other side to be revealed even if it takes a very long time.
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The moon is tidally locked with the earth. So think of it like the moon is kind of egg-shaped. The heavier side naturally stays to the outside of its orbit. As a result, we always see the skinny end (even though it does “wobble” a bit). Hope that helps.
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