Elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J · New York: J. Wiley & sons · leaf 120
the sun, thecircle ABV the ecliptic, and EQ this equatorial ring of theearth. Let ACVhe the plane of the equinoctial, meeting theplane of the ecliptic in the line of equinoxes A V. This planeis by definition determined at each instant by the position ofthe earths equator. The attraction exerted by… … Fig. 47. 114 PRECESSION. other in a direction perpendicular to that plane, or in the direction Ed. The suns attraction upon the nearer half of thering, then, tends to draw the plane of the ring nearer to theplane of the ecliptic. On the other hand, the suns attractionupon the farther half of the…
Astronomy
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