Celestial sphere

Related Terms:

backdrop sphaera recta hemisphere radius first point of libra almucantar equinoctial colure second solstitial colure vertical circle first point of capricorn nadir zodiac solstitial colure celestial first point of cancer sphere celestial pole celestial equator first point of aries atlantean sidereal year ecliptic heaven first solstitial colure first equinoctial colure abstract infinite planisphere second equinoctial colure zenith

Definitions:

Noun

celestial sphere sphere empyrean firmament heavens vault of heaven welkin

Definition: the apparent surface of the imaginary sphere on which celestial bodies appear to be projected

Definition: An abstract sphere of infinite radius which serves as the imaginary backdrop for celestial objects, and of which the visible sky is one hemisphere.