Wentworth, G. A. (George Albert), 1835-1906 · Boston, Ginn & company · leaf 175
or the south pole P is the elevated pole. SECTION LXVIISPHERICAL CO-ORDINATES Several systems of fixing the position of a star on the sur-face of the celestial sphere at any instant are in use. In eachsystem a great circle and its pole are taken as standards ofreference, and the position of the…
Trigonometry · Surveying · Navigation
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