Huygens, Christiaan
,
Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica
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SYSTEMA SATURNIUM.
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Apr. </
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<
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<
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xml:space
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fig. 3.</
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rat deprehenſus; </
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<
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<
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<
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igitur animadverſis, circulum deſcripſi orbitam comitis refe-
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rentem, in cujus centro Saturnus eſſet, atque in partes 16
<
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diſtribui, uti Schema ſubjectum exhibet. </
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<
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xml:space
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ſecundum ſignorum ordinem, circumduxi; </
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<
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dem obſervatione ut ita ſtatuerem cogente, ſed quod in
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eam partem Luna quoque noſtra & </
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<
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xml:space
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tur. </
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<
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xml:space
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">Poſtmodum autem ſtabilita hypotheſi, qua phæno-
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mean anſarum explicantur, patuit recte ita hunc morum me
<
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conſtituiſſe. </
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<
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xml:space
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">Porro in hoc circulo locum comitis quærendo
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quo in prima noſtra obſervatione ſtetiſſet, ſæpiuſque eun-
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dem retractando, ut obſervationibus per id tempus habitis
<
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congruerent etiam reliqua loca in circulo comiti aſſignata; </
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<
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demum commodiſſimè repreſentari omnia viſum eſt, ſi pri-
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ma obſervatione, nempe 25 Mart. </
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<
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xml:space
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">1655, ad numerum 12
<
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comes reponeretur, 3 partibus cum dimidia, qualium 16 cir-
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cumferentia continet à loco perigæo B remotus; </
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<
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xml:space
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metrum AB ad viſum noſtrum vergere ponimus, & </
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<
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hujus epicyclii apſides determinare. </
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<
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</
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<
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Apr. </
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<
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<
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xml:space
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">5, atque ita deinceps iis orbitæ locis quæ ob-
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ſervatis primi anni exactè ſatis conveniunt, quanquam ali-
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quid ſubinde addendum auferendumve 16 dierum periodo
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exiſtimaverim. </
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<
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xml:space
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">Cum autem ſcirem etiam orbitæ terreſtris,
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qua nos circa Solem ferimur, ipſiuſque Saturni motus ratio-
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nem habendam eſſe, ſi accuratè comitis periodum definire
<
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vellem, proinde ſequenti methodo eam deinceps inveſtigavi.</
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<
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xlink:href
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xml:space
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">Eadem peri@-
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dus accura-
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tius ſupputa-
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ta.</
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mes verſatus eſſet; </
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<
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">quorum alterum inveni 14 Martii, anno
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1659, veſperi circa horam octavam. </
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12 tantum prætergreſſus erat locum perigæi quantum ex ob-
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ſervatione illo tempore habita apparet, oportet eum circiter
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octavam in perigæo ipſo fuiſſe. </
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<
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xml:space
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tum colligo contigiſſe die 23 Martii, anno 1656, hora iti-
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dem octava poſt meridiem. </
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