Как по Английски будет libration

Как переводится Libration на Русский язык:

Что значит Libration в Английском языке:

noun

An apparent or real oscillation of the moon, by which parts near the edge of the disc that are often not visible from the earth sometimes come into view.

Примеры использования:

Permanent settlements have been proposed for the moon and mars, as well as stable positions in spac…