Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 126
the sun at a certaintime. As seen from the earth it Avill appear to be on the skyamong the stars at Si. Suppose that at the end of 25 daysthe sun has moved forward in a path around the earth tothe position S2; it will then appear to be among the stars atS%. That is, it will appear to have moved… … FlG. 33. — The hypothesis that the earth revolves around the sun explainsthe apparent eastward motion of the sun with respect to the stars. volves around the sun. Let S, Fig. 33, represent the sun,assumed fixed, and suppose Ei is the position of the earth ata certain time. The sun will appear to be…
Astronomy
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