Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 173
eal 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 ^-J-g- that of the sim. In Fig. 55 suppose S to represent the sun, the largecircle to… … imagine the latter to carry this circle with it in its an-nual course around the sun. Suppose that when the earthis at £ the moon is at M, Then if the earth move to E^ in 27J days, the moonwill have made a completerevolution relative to thestars—that is, it will be atJl/j, the line E^ M^ being…
Astronomy
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