selenology vs astronomy

selenology and astronomy both are nouns.

Word	Noun	Adjective	Verb	Adverb
selenology	Yes	No	No	No
astronomy	Yes	No	No	No

As nouns, astronomy is a hypernym of selenology; that is, astronomy is a word with a broader meaning than selenology:

selenology: the branch of astronomy that deals with the moon
astronomy: the branch of physics that studies celestial bodies and the universe as a whole

Other hypernyms of selenology include uranology.

selenology (noun)	astronomy (noun)
the branch of astronomy that deals with the moon	the branch of physics that studies celestial bodies and the universe as a whole