DescriptionDiurnal libration of the Moon (animated).gif
English: Diurnal libration of the Moon as observed using an image from the beginning of a night and a second image taken at the end of the same night. The images are shown alternatively as an animation to show the changing vantage point. The rotation of Earth during the night provides a moving vantage point that changes the angle from which the Moon is viewed by about 0.5°.
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