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.... (Astron.) The great circle of the celestial sphere, coincident with the plane of the earth's _____; -- so called because when the sun is in it, the days and nights are of equal length; hence called also the equinoctial, and on maps, globes, etc., the equinoctial line. _____ of the sun or of a planet (Astron.), the great circle whose plane passes through through the center ...


 


1. MARTIAN
2. EVECTION
3. EQUATOR
4. EYECUP
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