/ · 1894 Brewer’s · G · Galactic Circle (The)
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is to sidereal astronomy what the ecliptic is to planetary astronomy. The Galaxy being the sidereal equator, the Galactic circle is inclined to it at an angle of 63°.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.