Peck, William G. (William Guy), 1820-1892 · New York, Chicago, A. S. Barnes & company · leaf 108
itudeis first corrected for refraction,and the result taken from 90° ; this gives the arc ZS; the difference between the siderealtime of observation and the right ascension of S gives thehour angle ZPS ; the declination of S being subtractedfrom 90°, gives the value of PS. In the spherical… … Determination of Lati- The spherical triangle ZPS, in which S is any star, is often calledthe astronomical triangle, on account of its importance in astronomi- 104 ASTBOHOMY. 1 cal computations. In it, PZ is the co-latitude of the place of observation ; ZS is the zenith distance of the star; PS is…
Astronomy
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