Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 47
ace to place on the surface of the earth.If he moves directly toward the north his zenith wiU ap-proach the north pole, but as the zenith is not a visiblepoint, the motion will be naturally attributed to the pole,which will seem to approach the point overhead. Thenew apparent position of the pole… … Fig. 10.—THE PARALLEL SPHERE. If the observer is at the north pole his zenith and thepole itseK will coincide : half of the stars only will be vis-ible, and these will never rise or set, but appear to movearound in circles parallel to the horizon. The horizonand equator will coincide. The meridian…
Astronomy
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