nouns
a final climactic stage
"their achievements stand as a culmination of centuries of development"
(astronomy) a heavenly body's highest celestial point above an observer's horizon
domain category
the branch of physics that studies celestial bodies and the universe as a whole
is a type of (narrower)
a point in the heavens (on the celestial sphere)
the decisive moment in a novel or play
"the deathbed scene is the climax of the play"