CELESTIALEQUATOR

Celestial equator

The celestial equator is a great circle on the imaginary celestial sphere, in the same plane as the Earth's equator. In other words, it is a projection of the terrestrial equator out into space. As a result of the Earth's axial tilt, the celestial equator is inclined by 23.4° with respect to the ecliptic plane.

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celestial equator

Noun

  1. A great circle on the celestial sphere, coincident with the plane of earth's equator.


The above text is a snippet from Wiktionary: celestial equator
and as such is available under the Creative Commons Attribution/Share-Alike License.

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