Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 62
ASTRONOMY. 45 ot Tychos observations, for the purpose of discovering thetrue laws of planetary motion. He banished the compli-cated system of cycles, epicycles, and eccentrics forever fromthe heavens, and discovered the three laws of planetarymotion which have rendered his name immortal. 42. The… … Fig. 52. One method of describing an ellipse is shown in Fig. 53.Two tacks, F and F\ are stuck into a piece of paper, andto these are fastened the two ends of a string which is longerthan the distance between the tacks. A pencil is thenplaced against the string, and carried around, as shown inthe…
Astronomy
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![An illustration from Cosmographia in qvatvor libros distribvta summo ordine, miraqve facilitate, ac breuitate ad magnam Ptolemæi mathematicam constructionem, ad vniuersamque astrologiam institutens. Francisco Barocio ... avtore. Cum præfatione eiusdem autoris, in qua perfecta quidem astrologiæ diuisio, & enarratio autorum illustrium, & voluminum ab eis conscriptorum in singulis astrologiæ partibus habetur: Joannis de Sacrobosco verò 84 errores, et alij permulti suorum expositorum, & sectatorum ostenduntur. rationibusq[uam] redarguuntur. Præcesserunt etiam quædam communia mathematica, necnon arithmetica, & geometrica principia, nonnullæq[uam] propositiones, de quibus in toto opere sæpe fit mentio: ac demum locupletissimus index eorum, quæ ipsa Cosmographia continentur .. (1585)](https://img.insideoutlibrary.com/img/200/ia-cosmographiainqv00baro-381-100.webp)
