celestial equator

(redirected from Equatorial coordinate system)
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Related to Equatorial coordinate system: Ecliptic coordinate system
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  • noun

Synonyms for celestial equator

the great circle on the celestial sphere midway between the celestial poles

References in periodicals archive ?
The Incas adopted the equatorial coordinate system, or the right ascension and the declination to show position of the 7 brightest stars in the Pleiades cluster on the celestial sphere.
Like the Mayas, the adoption of the equatorial coordinate system was a unique contribution of the Incas to pre-Columbian astronomy, as ancient astronomers all used the ecliptic coordinate system to mark the position of fixed stars.
Applying intermediate 3D Cartesian horizontal and geocentric equatorial coordinate systems to determine an object's 3D position in the Earth's unified geodetic coordinate system by polar observations is suggested.