A compendium of astronomy; containing the elements of the science, familiarly explained and illustrated, with the latest discoveries. Adapted to the use of schools and academies, and of the general reader (1850)
Olmsted, Denison, 1791-1859 · New York, R. B. Collins · leaf 22
de , as it is commonly written. The supplement of an arc or angle, is what it wants ot 1H0°.Thus BA is the supplement of GDB, and GDB, is the supplementof BA. If BA were 20° of longitude, GDB its supplement would be 160°. ,.,_-. .. An angle is said to be subtended by the side which is opposite to… … 10 THE EARTH. The pole of a great circle, is the point on the spherewhere its axis cuts through the sphere. Every greatcircle has two poles, each of which is every where 90°from the great circle. All great circles of the sphere cut each other in twopoints diametrically opposite, and consequently,…
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-85-61.webp)
