Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 72
3.) A yet more restricted parallax is the horlscnital PAIiAZLAX. 51 pa/rallax of a heavenly body. The parallax first describedin the last paragraph varies with the position of the ob-server on the surface of the earth, and has its greatestvalue when the body is seen in the horizon of the ob-server,… … Fig. 19.—^HORIZONTAL PABAWiAX. The horizontal parallax depends upon the distance of abody in the following manner: In the triangle GPS,right-angled at S, we have CS= CP sin GPS. If, then, we put p, the radius of the earth els; r, the distance of the body P from the centre of theearth ; TT, the…
Astronomy
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