LIBRATION

Libration

In astronomy, libration is an oscillating motion of orbiting bodies relative to each other, notably including the motion of the Moon relative to Earth, or of Trojan asteroids relative to planets.

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libration

Noun

  1. The act of librating.
  2. The apparent wobble or variation in the visible side of the Moon that permanently faces the Earth, allowing observers on Earth to see, over a period of time, slightly more than half of the lunar surface.
  3. A similar rotational or orbital characteristic of some other celestial body.


The above text is a snippet from Wiktionary: libration
and as such is available under the Creative Commons Attribution/Share-Alike License.

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