libration
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The libration of the Moon over a single lunar month.
English
Etymology
From Latin lībrātiō (“a hurling, swinging”), from lībrō (“poise, cause to swing”).
Pronunciation
Noun
libration (countable and uncountable, plural librations)
- The act of librating.
- (astronomy) 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.
- (by extension) A similar rotational or orbital characteristic of some other celestial body.
- (dynamics) The oscillation of an angle about a stable equilibrium point.[1]
- (chemistry) A vibrational degree of freedom whereby a group of atoms partly rotates back and forth, similar to the Moon's motion.
Derived terms
Related terms
Translations
act of libration
astronomy: apparent wobble of the moon
astronomy: similar characteristic of another celesial object
See also
References
- ^ Morbidelli, Alessandro (2002) Modern celestial mechanics: aspects of solar system dynamics, page 73
French
Pronunciation
Audio: (file)
Noun
libration f (plural librations)
Derived terms
Further reading
- “libration”, in Trésor de la langue française informatisé , 2012.