Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 42
oint in which theearths axis of rotation, if continued out in a straight lineof infinite length, would meet the celestial sphere. Wethus have a series of circles on the celestial sphere corre-sponding to the parallels of latitude upon the earth.Unfortunately the celestial element corresponding… … cisely as latitude on the earth is distance from the eartlisequator. Let i be a place on the earth, P^ju Q, Pp being the earths axis,and E Q its equator. Z is thezenith and H R the horizon of L.L 0 Q\s the latitude ot L accord-ing to ordinary geographical de-finitions : i.e., it is its angular…
Astronomy
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