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... > Observational astronomy > Astronomical techniques > Astrometry > Astronomical coordinate systems > Equatorial coordinate system > Celestial poles

Preferred term

Celestial poles  

Definition

  • The point of the sky, north or south, where the projection of the Earth's axis of rotation intersects the celestial sphere. They are at 90° relative to the celestial equator. Because of precession, the celestial poles describe a circle around the ecliptic's poles every 25,800 years. (en)

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Contributor

Editorial note

URI

http://astrothesaurus.org/uat/213

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