Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 173
real motion of these threebodies, we must imagine the earth performing its circuitaround the sun in one year, and carrying with it the moon,which makes a revolution around it in 27 days, at a distanceonly about Tfo that of the sun. In Fig. 55 suppose S to represent the sun, the largecircle to… … Fro. 55. imagine the latter to cany this circle with it in its an-nual course around the sun. Suppose that when the earthis at E the moon is at M. Then if the earth move to J£x in 27J days, the moonwill have made a completerevolution relative to thestars—that is, it will be atM2, the line El J/a…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
