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Concept information

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

Preferred term

Celestial equator  

Definition

  • An imaginary great circle on the sky half-way between the celestial poles. It is the projection of the equator of the Earth on the sky. (en)

Broader concept

Contributor

Editorial note

URI

http://astrothesaurus.org/uat/210

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