Celestial equator
1celestial equator — n. the great circle formed on the celestial sphere by extending the plane of the earth s equator: see DECLINATION …
2Celestial equator — The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth s equator. In other words, it is a projection of the terrestrial equator out into space. As result of the Earth s axial tilt, the celestial… …
3celestial equator — Astron., Navig. the great circle of the celestial sphere, lying in the same plane as the earth s equator. Also called equator, equinoctial, equinoctial circle, equinoctial line. [1870 75] * * * …
4celestial equator — The great circle of the celestial sphere, in which all points are 90° from the poles. It is the plane of the earth’s equator projected onto the celestial sphere. Also called equinoctial …
5celestial equator — noun A great circle on the celestial sphere, coincident with the plane of earths equator …
6celestial equator — celes′tial equa′tor n. astron. naut. navig. the great circle of the celestial sphere, lying in the same plane as the earth s equator • Etymology: 1870–75 …
7celestial equator — noun Date: 1848 the great circle on the celestial sphere midway between the celestial poles …
8celestial equator — noun the great circle on the celestial sphere midway between the celestial poles • Syn: ↑equinoctial circle, ↑equinoctial line, ↑equinoctial • Derivationally related forms: ↑equinoctial (for: ↑equinoctial) …
9celestial equator — noun the projection into space of the earth s equator …
10celestial equator — imaginary circle which separates the celestial sphere into two equal halves …
