BabelNet

bn:00050977n

Noun Concept

Categories: Orbit of the Moon, Dynamics of the Solar System

libration Diurnal Libration Libration in longitude Geometrical libration Librartion

(astronomy) a real or apparent slow oscillation of a moon or satellite WordNet 3.0

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(astronomy) a real or apparent slow oscillation of a moon or satellite WordNet 3.0 & Open English WordNet

In lunar astronomy, libration is the cyclic variation in the apparent position of the Moon perceived by Earth-bound observers and caused by changes between the orbital and rotational planes of the moon. Wikipedia

Perceived oscillating motion of orbiting bodies relative to each other Wikidata

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. Wiktionary

Astronomy: apparent wobble of the moon. Wiktionary (translation)

The libration of the moon WordNet 3.0 & Open English WordNet

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The Nuttall Encyclopædia