Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 89
equator. The zenith of the ob-server is in the celestial equator. The latitude of the ob-server is 0° and hence the altitude of the north celestialpole (of Polaris) is 0°; that is, the north and south celes-tial poles are in his horizon. All the stars appear to movein their diurnal orbits parallel… … Fig. 40. The circles of the celestial sphere and the diurnal motions of the stars asthey appear to an observer on the earths equator. of the celestial sphere, will be visible, for all of them willrise, every day, above the eastern horizon and will passacross the sky and set below the western…
Astronomy
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