Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 41
inate since Z and P coincide ; there \y\\\ be no east andwest line, and no direction but soutli. The sphere in thiscase is called a parallel sphere. 22 ASTRONOMY. If instead of travelling to tlie north the observer shouldgo toward the equator, the north pole would seem to ap-proach his horizon.… … Fig. 9.—the right sphere. The sphere in this case is called a right sphere, becausethe diurnal motion is at right angles to the horizon. If nowthe observer travels southward from the equator, the southpole will become elevated above his horizon, and in thesouthern hemisphere appearances will be…
Astronomy
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