Celestial Equator

+The Celestial Equator is an imaginary great circle projected onto the [Celestial Sphere](/wiki/celestial_sphere), lying in the same plane as Earth's [Equator](/wiki/equator). It marks the fundamental divide between the northern and southern celestial hemispheres, guiding the mapping of stars and planets across the sky.

+## See also

+- [Ecliptic](/wiki/ecliptic)

+- [Declination](/wiki/declination)

+- [Right Ascension](/wiki/right_ascension)