celestial+equator
11celestial equator — /səˌlɛstiəl əˈkweɪtə/ (say suh.lesteeuhl uh kwaytuh) noun Navigation, Astronomy a great circle of the celestial sphere, the plane of which is perpendicular to the axis of the earth …
12Celestial meridiator — is a vertical imaginary line that goes over the celestial poles and crosses (perpendicular to) the celestial equator. There are two celestial meridiators on the celestial sphere: Equinox meridiator and Solstice meridiator.NameThe meridiators are… …
13Celestial sphere — [ celestial equator.] In astronomy and navigation, the celestial sphere is an imaginary rotating sphere of gigantic radius , concentric and coaxial with the Earth. All objects in the sky can be thought of as lying upon the sphere. Projected from… …
14equator — late 14c., from M.L. aequator diei et noctis equalizer of day and night (when the sun is on the celestial equator, twice annually, day and night are of equal length), agent noun from L. aequare make equal (see EQUATE (Cf. equate)). Sense of… …
15equator — [ē kwāt′ər, ikwāt′ər] n. [ME < ML < LL aequator, lit., one who makes equal: see EQUATE] 1. an imaginary circle around the earth, equally distant at all points from both the North and South Poles: it divides the earth s surface into the… …
16Celestial coordinate system — For other uses of Celestial , see Celestial (disambiguation). Orientation of Astronomical Coordinates Orientation of the galactic, ecliptic and equatorial coordinate systems, projected on the celestial sphere, showing the galactic equator (black) …
17equator — /i kway teuhr/, n. 1. the great circle on a sphere or heavenly body whose plane is perpendicular to the axis, equidistant everywhere from the two poles of the sphere or heavenly body. 2. the great circle of the earth that is equidistant from the… …
18Equator — For other uses, see Equator (disambiguation). 0° Equator …
19celestial sphere — the imaginary spherical shell formed by the sky, usually represented as an infinite sphere, the center of which is a given observer s position. [1875 80] * * * Apparent surface of the heavens, on which the stars seem to be fixed. For the purpose… …
20Celestial pole — The north and south celestial poles and their relation to axis of rotation, plane of orbit and axial tilt …
