Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 388
ch we see on one evening is not absolutely the same we sawthe evening before. A portion of the latter has been dissipated,while new matter has taken its place, as with the stream of smokefrom a steamship. It is an observed fact that the vapor which risesfrom the nucleus of a comet is repelled by… … Fig. 196. —Orbtt of Halleys Comet. Periodic Comets.—The first discovery of the periodicity of a cometwas made by Halley in connection with the great comet of 1682.This comet moves in an immense elliptic orbit with a periodic timeof 76 years. Halley predicted that it would return in 1758.…
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)
