Lunar Libration
 Although the Moon is locked in orbit with the Earth, so that we only see one face from Earth, that face seems to wobble somewhat. This is called libration. Libration of latitude occurs because the Moon's axis of rotation is not perpendicular to the plane of its orbit, so an observer in the northern hemisphere can sometimes see over the Moon's north pole and under its south pole.   "Lunar Libration" from The Wolfram Demonstrations Project http://demonstrations.wolfram.com/LunarLibration/ Contributed by: Jeff Bryant | ||||||||||||||
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