minor planet vs celestial body

minor planet and celestial body both are nouns.

Word	Noun	Adjective	Verb	Adverb
minor planet	Yes	No	No	No
celestial body	Yes	No	No	No

As nouns, celestial body is a hypernym of minor planet; that is, celestial body is a word with a broader meaning than minor planet:

minor planet: any of numerous small celestial bodies that move around the sun
celestial body: natural objects visible in the sky

Other hypernyms of minor planet include heavenly body.

minor planet (noun)	celestial body (noun)
any of numerous small celestial bodies that move around the sun	natural objects visible in the sky