libration
Noun
-
(astronomy) a real or apparent slow oscillation of a moon or satellite (synset 113528820)
"the libration of the moon"referred to in: astronomy, uranology - the branch of physics that studies celestial bodies and the universe as a wholeis a type of:
- variation - (astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon)
- oscillation - the process of oscillating between states
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