Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 194
n. In the summer the altitudeof the Sun is high and the days are long. In the winterthe altitude of the Sun is not so high and the days areshorter. The difference between the heat of summer andwinter depends chiefly on the differences named. TheEarth revolves about the San in an orbit which is… … Fig. 109.—The Ecliptic, CD, and the Celestial Equator,AB, with their poles, Q and P. The Suns apparent motion is in the ecliptic CD. Thevernal equinox is at E, the summer solstice at D, theautumnal equinox at F, the winter solstice at C. The arcBD = AC= 23^°, the obliquity of the ecliptic. The Suns…
Astronomy
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