The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1872)
White, Charles J. (Charles Joyce), 1839-1917 · Philadelphia, Claxton, Remsen & Haffelfinger · leaf 80
the local time (either solar orsidereal) is known, the latitude may be obtained from altitudeswhich are not measured on the meridian. Let Fig. 30 be a pro-jection of the celestial sphere on the planeof the horizon. Z is the zenith of the place,P the elevated pole, PZ the co-latitude, andS a star,… … REDUCTION OF THE LATITUDE. 10 SPZ, we have the sides ZS and SP, and the angle SPZ, and cantherefore compute the value of the co-latitude, PZ, by the for-mulae of Spherical Trigonometry. An analytical investigation of the formula? by which this pro-blem is solved shows that errors in the observed…
Astronomy
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-318-210.webp)
