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- Celestial_pole abstract "The north and south celestial poles are the two imaginary points in the sky where the Earth's axis of rotation, indefinitely extended, intersects the imaginary rotating sphere of stars called the celestial sphere. The north and south celestial poles appear permanently directly overhead to an observer at the Earth's North Pole and South Pole respectively. As the Earth spins on its axis, the two celestial poles remain fixed in the sky, and all other points appear to rotate around them, completing one circuit per day (strictly per sidereal day).The celestial poles are also the poles of the celestial equatorial coordinate system, meaning they have declinations of +90 degrees and −90 degrees (for the north and south celestial poles, respectively).The celestial poles do not remain permanently fixed against the background of the stars. Because of a phenomenon known as the precession of the equinoxes, the poles trace out circles on the celestial sphere, with a period of about 25,700 years. The Earth's axis is also subject to other complex motions which cause the celestial poles to shift slightly over cycles of varying lengths; see nutation, polar motion and axial tilt. Finally, over very long periods the positions of the stars themselves change, because of the stars' proper motions.An analogous concept applies to other planets: a planet's celestial poles are the points in the sky where the projection of the planet's axis of rotation intersects the celestial sphere. These points vary because different planets' axes are oriented differently (the apparent positions of the stars also change slightly because of parallax effects).Celestial bodies other than Earth also have similarly defined celestial poles.".
- Celestial_pole thumbnail AxialTiltObliquity.png?width=300.
- Celestial_pole wikiPageExternalLink astronomy.html.
- Celestial_pole wikiPageExternalLink polaris.shtml.
- Celestial_pole wikiPageID "48329".
- Celestial_pole wikiPageRevisionID "604031594".
- Celestial_pole hasPhotoCollection Celestial_pole.
- Celestial_pole subject Category:Celestial_coordinate_system.
- Celestial_pole comment "The north and south celestial poles are the two imaginary points in the sky where the Earth's axis of rotation, indefinitely extended, intersects the imaginary rotating sphere of stars called the celestial sphere. The north and south celestial poles appear permanently directly overhead to an observer at the Earth's North Pole and South Pole respectively.".
- Celestial_pole label "Biegun niebieski".
- Celestial_pole label "Celestial pole".
- Celestial_pole label "Hemelpool".
- Celestial_pole label "Himmelspol".
- Celestial_pole label "Polo celeste".
- Celestial_pole label "Polo celeste".
- Celestial_pole label "Polo celeste".
- Celestial_pole label "Pôle céleste".
- Celestial_pole label "Полюс мира".
- Celestial_pole label "قطب سماوي".
- Celestial_pole label "天極".
- Celestial_pole sameAs Nebeský_pól.
- Celestial_pole sameAs Himmelspol.
- Celestial_pole sameAs Polo_celeste.
- Celestial_pole sameAs Zeru_polo.
- Celestial_pole sameAs Pôle_céleste.
- Celestial_pole sameAs Polo_celeste.
- Celestial_pole sameAs Hemelpool.
- Celestial_pole sameAs Biegun_niebieski.
- Celestial_pole sameAs Polo_celeste.
- Celestial_pole sameAs m.0cybh.
- Celestial_pole sameAs Mx4rvkjr2JwpEbGdrcN5Y29ycA.
- Celestial_pole sameAs Q12119.
- Celestial_pole sameAs Q12119.
- Celestial_pole wasDerivedFrom Celestial_pole?oldid=604031594.
- Celestial_pole depiction AxialTiltObliquity.png.
- Celestial_pole isPrimaryTopicOf Celestial_pole.
