Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 137
e pole is the place wherethe axis of the earth, extended, pierces the sky, it is obviousthat, if an observer were at a pole of the earth, the celestialequator would be on his horizon and the celestial pole wouldbe at his zenith; while, if he were on the equator of theearth, the celestial equator… … Fig. 41. — The altitude of the celestial pole equals the .latitude of the observer. north pole of the sky. Since the sky is extremely far awaycompared to the dimensions of the earth, the line from 0to the celestial pole is essentially parallel to PP. The anglebetween the plane of the horizon and…
Astronomy
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