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But as the moon makes its elliptical orbit, its velocity varies and alters that synchronicity, causing our perspective of the "light side" to appear at slightly different angles throughout any given month. In short, the moon wobbles. At least, it does to our eyes. A casual glance skyward won't reveal this, but when a full month of lunar views gets compressed into 12 seconds, as in the visualization below, it's impossible to miss. This rocking like a ship at sea is called libration, from the Latin for balance scale. Instead of just one side, we actually see about 59 percent of the lunar surface over the course of an orbit.
originally posted by: anotherside
Im having issues uploading the image i want to make an example of. Its a picture of the moon from the 80s off an album cover. Our moon rotates once every 27 days. Possibly causing us to see different faces. But i grew up learning in school the moon doesnt rotate. And the angle never changed. Now both happen.