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galactic equator
noun
, Astronomy.
- the great circle on the celestial sphere that is equidistant from the galactic poles, being inclined approximately 62° to the celestial equator and lying about one degree north of the center line of the Milky Way.
galactic equator
noun
- the great circle on the celestial sphere containing the galactic plane
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Word History and Origins
Origin of galactic equator1
First recorded in 1885–90
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