= Libration
{wiki=Libration}
Libration is a phenomenon observed in celestial mechanics, particularly in the context of the Moon's orbit around the Earth. It refers to the oscillating motion that allows us to see slightly more than half of the Moon's surface from Earth over time. This effect occurs due to the Moon's elliptical orbit and its axial tilt. There are two primary types of libration: 1. **Libration in Longitude**: This occurs because the Moon's orbital speed varies as it travels along its elliptical path.
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