An introduction to astronomy : designed as a text book for the students of Yale College (1846)
Olmsted, Denison, 1791-1859, Yale College (1718-1887) · New York : Collins, Brother & Co. · leaf 45
mo-tion are oblique to the horizon. Suppose for example the spectator is at the latitude of fifty de-grees. His horizon reaches 50° beyond the pole of the earth, andgives the same apparent elevation to the pole of the heavens. Itcuts the equator, and all the circles of daily motion, at an angleof… … Then the horizon of a spectator Fig. 5. at Z, iri latitude 50° reaches to50° beyond the pole (Art. 50);and the angle ECU, is 40°. Aswe advance still further north,the elevation of the diurnal cir-cles grows less and less, andconsequently the motions of theheavenly bodies more and moreoblique, until…
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-87-64.webp)
