Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 70
(3.) A yet more restricted parallax is the horizontal PARALLAX. 51 jpa/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,… … HORIZONTAL PARALLAX. The horizontal parallax depends upon the distance of abody in the following manner: In tlie triangle OPS,right-angled at S, we have 08= CP sin CPS. If, then, we put p, the radius of the earth C S; r, the distance of the body P from the centre of theearth ; TT, the angle S P C,…
Astronomy
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