Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 56
Fig. 14.—Correspondence of the Terrestrial and CelestialMeridians of an Observer. … Fig. 15.—The Celestial Sphere. 38 ASTRONOMT. zon. P is the north celestial pole. PZS is the observers celestialmeridan. XXI, XXII ... O, I, II ... is the celestial equator,and 0 is the vernal equinox—the origin of right-ascensions. Paral-lels of declination are shown (circles parallel to the…
Astronomy
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