s/n11415084

Information
has gloss	(noun) (astronomy) any perturbation of the mean motion or orbit of a planet or satellite (especially a perturbation of the earth's moon) variation
lexicalization	eng: variation
subclass of	(noun) (physics) a secondary influence on a system that causes it to deviate slightly perturbation
has subclass	(noun) (astronomy) a real or apparent slow oscillation of a moon or satellite; "the libration of the moon" libration

Links
has category	(noun) the branch of physics that studies celestial bodies and the universe as a whole astronomy, uranology