The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 50
tory motion, like thehandle of a spinning-top which has begun to wabble a litde.This gyratory motion causes the axis of the heavens todescribe a cone in about twenty-six thousand years, and thepole of the heavens to describe a circle about the pole ofthe ecliptic in the same time. Tlie radius of… … 32 ASTRONOMY. the ecliptic; the oblique ring E Q represents the equator;V and A represent the equinoctial point, and E and C thesolstitial points i B represents ihe pole of the ecliptic, P thepole of the equator, and P O the celestial axis. The ring E Qis supported on a pivot at Oj and the rod B P,…
Astronomy
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