Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 52
zenith- and nadir-points. On page 28 the horizon was described as the flatplain on which the observer stands and on which the up- SPACE—THE CELESTIAL SPHERE—DEFINITIONS. 31 per half of the celestial sphere rests. Such a plane iscalled the plane of the sensible horizon (i.e., of the horizonevident… … Fig. 12.—The Earth (n, q, s, e) surrounded by the CelestialSphere {N, Q, S, E). The meridians and parallels on the celestial sphere servethe same purpose as the meridians and parallels on theEarth. The latitude of a place on the Earth is its angulardistance north or south of the terrestrial…
Astronomy
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