uranology vs astronomy

uranology and astronomy both are nouns.

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

As nouns, uranology and astronomy are synonyms defined as:

uranology and astronomy: the branch of physics that studies celestial bodies and the universe as a whole

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