You searched for: “celestial spheres
celestial sphere (s) (noun), celestial spheres (pl)
1. The imaginary orbit around the Earth: The sun, moon, stars, and planets appear to be placed on the celestial sphere.
2. The imaginary shell formed by the sky: The celestial sphere is usually, represented as an infinite circle, the center of which is the observer's position.
This entry is located in the following units: -al; -ial, -eal (page 12) celest- (page 1) sphero-, spher-, -sphere- (page 6)