Descartes, René
,
Renati Des-Cartes principia philosophiae
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ſed Aſtronomis, qui jam omnes ſciunt illam ad coelum
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comparatam inſtar puncti eſſe, non ita mirum videri
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debet. </
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XL.
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Terrae tranſlationem
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nullam efficere aſpe
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ctùs diverſitatem in
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Fixis, propter maxi
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mam ipſarum diſtan
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tiam. </
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Ac praeterea Cometae, quos jam fatis conſtat in
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noſtro ae
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re non verſari, ut nimis rudis
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opinabatur, vaſtiſſimum iſtud ſpatium inter ſpheram
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Saturni & fixas requirunt, ad omnes ſuas excurſiones
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abſolvendas: adeò enim variae ſunt, adeò immanes,
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&sà Fixarum ſtabilitate atque à regulari Planetarum
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circa Solem circuitione adeò diſcrepantes, ut
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eo ad nullas naturae leges revolcari poſſe videantur. </
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Neque nos movere debet qu'od Tycho & alii Aſtro
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nomi, qui diligenter eorum parallaxes inveſtigârunt,
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dixerint tantùm illos eſſe ſupra Lunam, verſùs ſphae
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ram Veneris aut Mercurii, non autem ſupra
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Saturnum: hoc enim non minùs recte ex ſuis calculis
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concludere potuiſſent, quàm illud. </
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rent contra veteres, qui Cometas inter meteora ſublu
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naria numerabant, contenti ſuerunt oſtendere illos in
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coelo eſſe; nec auſi ſunt omnem altitudinem,
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calculo deprehendebant, iis tribuere, ne minús facile
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crederetur. </
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XLI.
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Hanc etiam Fixarum
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diſtantiam requiri ad
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motus Cometarum,
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quos jam conſtat eſſe
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in coelo. </
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Praeter haec autem generaliora, poſſent adhuc parti
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cularia multa, non mode circa Solem, Planetas, Come
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tas & fixas, ſed proecipu etiam circa Terram
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illa omnia quae in ejus ſuperficie videmus), inter phae
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nomena hic recenſeri. </
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<
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>Ut enim veram hujus mundi
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aſpectabilis naturam agnoſcamus, non ſatis eſt ali
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quas cauſas invenire, per quas ea quae in coelo eminus
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aſpicimus explicentur; ſed ex iiſdem etiam, illa
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quae in Terrâ cominus intuemur, deduci debent. </
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