Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 201
needs only a common watch and a straightruler some three feet long, together with a star-map. Suppose that hewishes to determine the place of the planet Mars ( $ ). The first stepis to identify the planet in the sky, by its brightness, its place, or byits motion. He then selects two bright stars… … Fig. 117.—Copernicus.Born 1473, died 1543. 180 APPARENT MOTIONS OF THE PLANETS. 181 is, however, let us say, a little to the west of the line. On the star-map he must find the two stars A and B. Suppose that they area and (5 Auriga (between the numbers 105° and 120° at the top ofPlate II). A dot…
Astronomy
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