antapex vs celestial point

antapex and celestial point both are nouns.

Word	Noun	Adjective	Verb	Adverb
antapex	Yes	No	No	No
celestial point	Yes	No	No	No

As nouns, celestial point is a hypernym of antapex; that is, celestial point is a word with a broader meaning than antapex:

antapex: the point opposite in direction from the solar apex; the point the solar system is moving away from
celestial point: a point in the heavens (on the celestial sphere)

antapex (noun)	celestial point (noun)
the point opposite in direction from the solar apex; the point the solar system is moving away from	a point in the heavens (on the celestial sphere)