Celestial poles
Pole Pole, n. [L. polus, Gr. ? a pivot or hinge on which anything turns, an axis, a pole; akin to ? to move: cf. F. p[^o]le.] 1. Either extremity of an axis of a sphere; especially, one of the extremities of the earth's axis; as, the north pole. [1913 Webster]

2. (Spherics) A point upon the surface of a sphere equally distant from every part of the circumference of a great circle; or the point in which a diameter of the sphere perpendicular to the plane of such circle meets the surface. Such a point is called the pole of that circle; as, the pole of the horizon; the pole of the ecliptic; the pole of a given meridian. [1913 Webster]

3. (Physics) One of the opposite or contrasted parts or directions in which a polar force is manifested; a point of maximum intensity of a force which has two such points, or which has polarity; as, the poles of a magnet; the north pole of a needle. [1913 Webster]

4. The firmament; the sky. [Poetic] [1913 Webster]

Shoots against the dusky pole. --Milton. [1913 Webster]

5. (Geom.) See {Polarity}, and {Polar}, n. [1913 Webster]

{Magnetic pole}. See under {Magnetic}.

{Poles of the earth}, or {Terrestrial poles} (Geog.), the two opposite points on the earth's surface through which its axis passes.

{Poles of the heavens}, or {Celestial poles}, the two opposite points in the celestial sphere which coincide with the earth's axis produced, and about which the heavens appear to revolve. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • celestial poles — plural noun (astronomy) The two points at which the earth s axis, extended indefinitely, cuts the celestial sphere • • • Main Entry: ↑celestial …   Useful english dictionary

  • celestial poles — The point on the celestial sphere where the earth’s axis, if projected, would intersect the celestial sphere …   Aviation dictionary

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

  • Poles of astronomical bodies — This article is about geographic, magnetic and other poles on planets and other astronomical bodies. For the Earth s poles, see North Pole, South Pole, North Magnetic Pole, and South Magnetic Pole. See also Pole of inaccessibility. The poles of… …   Wikipedia

  • 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

  • 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

  • Poles of the earth — Pole Pole, n. [L. polus, Gr. ? a pivot or hinge on which anything turns, an axis, a pole; akin to ? to move: cf. F. p[^o]le.] 1. Either extremity of an axis of a sphere; especially, one of the extremities of the earth s axis; as, the north pole.… …   The Collaborative International Dictionary of English

  • Poles of the heavens — Pole Pole, n. [L. polus, Gr. ? a pivot or hinge on which anything turns, an axis, a pole; akin to ? to move: cf. F. p[^o]le.] 1. Either extremity of an axis of a sphere; especially, one of the extremities of the earth s axis; as, the north pole.… …   The Collaborative International Dictionary of English

  • celestial meridian — Semi–great circles produced by projecting the earth’s meridian onto the celestial sphere. Each earth’s meridian has its corresponding celestial meridian. The celestial meridian of any place on the earth is the great circle of the celestial sphere …   Aviation dictionary

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

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