Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 93
ontains the zenith of that place 72 ASTRONOMY. and the two celestial poles. It cuts from the earths surface the ter-restrial meridian, and from the celestial sphere that great circlewhich we have denned as the celestial meridian. To fix the ideas, let us suppose an observer at some one point of… … Fig. 43. The change of the position of the observers zenitb on the celestial spheredue to the diurnal motion. cuts from the celestial sphere the celestial meridian. As the Earthrotates on its axis his zenith moves round the celestial sphere in a par-allel, as ZL in the last figure. Suppose that the…
Astronomy
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