celestial equator

  • 1 celestial equator — n. the great circle formed on the celestial sphere by extending the plane of the earth s equator: see DECLINATION …

    English World dictionary

  • 2 Celestial 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… …

    Wikipedia

  • 3 celestial 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] * * * …

    Universalium

  • 4 celestial 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 …

    Aviation dictionary

  • 5 celestial equator — noun A great circle on the celestial sphere, coincident with the plane of earths equator …

    Wiktionary

  • 6 celestial 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 …

    From formal English to slang

  • 7 celestial equator — noun Date: 1848 the great circle on the celestial sphere midway between the celestial poles …

    New Collegiate Dictionary

  • 8 celestial 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) …

    Useful english dictionary

  • 9 celestial equator — noun the projection into space of the earth s equator …

    English new terms dictionary

  • 10 celestial equator — imaginary circle which separates the celestial sphere into two equal halves …

    English contemporary dictionary

  • 11 celestial 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 …

    Australian English dictionary

  • 12 Celestial 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… …

    Wikipedia

  • 13 Celestial 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… …

    Wikipedia

  • 14 equator — 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… …

    Etymology dictionary

  • 15 equator — [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… …

    English World dictionary

  • 16 Celestial 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) …

    Wikipedia

  • 17 equator — /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… …

    Universalium

  • 18 Equator — For other uses, see Equator (disambiguation). 0° Equator …

    Wikipedia

  • 19 celestial 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… …

    Universalium

  • 20 Celestial pole — The north and south celestial poles and their relation to axis of rotation, plane of orbit and axial tilt …

    Wikipedia