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abstraction > mathematical concept > geometrical object > plane > equator > celestial equator |
celestial equator comparison table |
Subject | is a kind of | has definition |
---|---|---|
equator | plane | The great circle on the surface of a body formed by the intersection of the surface with the plane passing through the center of the body perpendicular to the axis of rotation. (See celestial equator.) |
celestial equator | equator | Projection of the Earth's equator as a line across the sky (so that to an observer actually on the equator, such a line would pass through the zenith). The directional bearing of a star is given in terms of its right ascension round the celestial equator. |
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