NASA / SCIENCE PHOTO LIBRARY / GODDARD SPACE FLIGHT CENTER SCIENTIFIC VISUALIZATION STUDIO NASA / SCIENCE PHOTO LIBRARY / GODDARD SPACE FLIGHT CENTER SCIENTIFIC VISUALIZATION STUDIO
Lunar phases and libration 2012. Composite of the changing phases and libration of the Moon for the whole of 2012. Libration is a phenomenon where the apparent diameter and tilt of the Moon varies due to variations in its orbit around the Earth.
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