Celestial
Etymology
From Latin "caelestis," from "caelum" (sky, heaven). The word carried both meanings from the start: the physical dome of the sky and the dwelling place of the divine. English inherited that double life, so a "celestial" object can be a star or an angel depending on the sentence.
adjective · /suh-LES-chuhl/
Relating to the sky or heavens, or having a divine, otherworldly quality.
What it names
Useful for both the literal astronomical sense — celestial bodies, the celestial sphere — and the figurative one of unearthly beauty or serenity.
Example
The choir’s harmonies had a celestial clarity that silenced the restless crowd.
Related idea
Ethereal means delicate, light, and otherworldly in feel; celestial locates that otherworldliness specifically in the sky or the heavens.