star vs heavenly body

star and heavenly body both are nouns.

Word	Noun	Adjective	Verb	Adverb
star	Yes	Yes	Yes	No
heavenly body	Yes	No	No	No

As nouns, heavenly body is a hypernym of star; that is, heavenly body is a word with a broader meaning than star:

star: (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
heavenly body: natural objects visible in the sky

Other hypernyms of star include celestial body.

As nouns, heavenly body is a hypernym of star; that is, heavenly body is a word with a broader meaning than star:

star: any celestial body visible (as a point of light) from the Earth at night
heavenly body: natural objects visible in the sky

Other hypernyms of star include celestial body.

star (noun)	heavenly body (noun)
the topology of a network whose components are connected to a hub	natural objects visible in the sky
a star-shaped character * used in printing
(astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
any celestial body visible (as a point of light) from the Earth at night
an actor who plays a principal role
someone who is dazzlingly skilled in any field
a performer who receives prominent billing
a plane figure with 5 or more points; often used as an emblem

star (adjective)	heavenly body (adjective)
indicating the most important performer or role