Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

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            <s xml:id="echoid-s6251" xml:space="preserve">
              <pb o="564" file="0296" n="311" rhead="CHRIST. HUGENII"/>
            niæ motus jam inde à principio animadverſus, non parum
              <lb/>
            hîc adjuvit; </s>
            <s xml:id="echoid-s6252" xml:space="preserve">ſiquidem ex hujus circa Saturnum gyratione,
              <lb/>
            prima mihi ſpes de conſtituenda hypotheſi affulſit. </s>
            <s xml:id="echoid-s6253" xml:space="preserve">Quæ
              <lb/>
            cujuſmodi ſit deinceps explicare aggredior.</s>
            <s xml:id="echoid-s6254" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6255" xml:space="preserve">Quum ergo 16 dierum periodo circumferri Saturno pla-
              <lb/>
              <note position="left" xlink:label="note-0296-01" xlink:href="note-0296-01a" xml:space="preserve">Noſtra hy-
                <lb/>
              potheſis qua
                <lb/>
              ratione exco-
                <lb/>
              gitata.</note>
            netam novum comperiſſem, haud dubiè minori etiam tem-
              <lb/>
            poris ſpatio Saturnum in ſeſe ſuper axem ſuum revolvi ar-
              <lb/>
            bitratus ſum. </s>
            <s xml:id="echoid-s6256" xml:space="preserve">Namque antea quoque, in eo cum Tellure
              <lb/>
            hac noſtra cæteris primariis Planetis convenire, ſemper cre-
              <lb/>
            didi, quod ſinguli in ſe ipſis rotentur, atque ita tota eorum
              <lb/>
            ſuperficies lumine ſolis per vices gaudeat. </s>
            <s xml:id="echoid-s6257" xml:space="preserve">Quin imo in u-
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            niverſum ita cum magnis Mundi corporibus comparatum eſ-
              <lb/>
            ſe, ut illa quibus alia minora circumferuntur, ipſa quoque
              <lb/>
            in medio poſita minori tempore circumeant. </s>
            <s xml:id="echoid-s6258" xml:space="preserve">Ita enim So-
              <lb/>
            lem diebus 26 circiter in ſe redire maculæ ejus declarant:
              <lb/>
            </s>
            <s xml:id="echoid-s6259" xml:space="preserve">circa Solem vero Planetarum ſinguli, inter quos Tellus quo-
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            que reponenda eſt, prout quiſque remotior eſt ita tardius
              <lb/>
            curſum conficiunt. </s>
            <s xml:id="echoid-s6260" xml:space="preserve">Rurſus Tellus hæc diurno ſpatio gyra-
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            tur, quam Luna menſtruo motu ambit. </s>
            <s xml:id="echoid-s6261" xml:space="preserve">Jovis autem Plane-
              <lb/>
            tam quatuor minores, hoc eſt, totidem Lunæ circumſtant,
              <lb/>
            eâdem hac lege, ut propiores quæ ſunt, celeriore curſu fe-
              <lb/>
            rantur. </s>
            <s xml:id="echoid-s6262" xml:space="preserve">Unde Jupiter quidem breviori forſitan tempore
              <lb/>
            quam 24 horarum converti cenſendus eſt, cum citima ei lu-
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            nularum m@nus biduo impendat. </s>
            <s xml:id="echoid-s6263" xml:space="preserve">Quæ omnia cum pridem
              <lb/>
            cognoviſſem, Saturno quoque jam tum ſimilem motum in-
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            eſſe judicabam. </s>
            <s xml:id="echoid-s6264" xml:space="preserve">De celeritate autem periodi, comitis ſui ob-
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            ſervatio me certiorem fecit. </s>
            <s xml:id="echoid-s6265" xml:space="preserve">Qui cum 16 diebus orbitam
              <lb/>
            expleat, Saturnum in centro orbitæ ſitum, multo frequen-
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            tius circumagi arguit. </s>
            <s xml:id="echoid-s6266" xml:space="preserve">Jam verò & </s>
            <s xml:id="echoid-s6267" xml:space="preserve">hoc credibile videbatur,
              <lb/>
            omnem cæleſtem materiam, Saturnum inter comitemque e-
              <lb/>
            jus interjectam, eidem motui obnoxiam eſſe, hoc pacto ut
              <lb/>
            quo Saturno propinquior eſt, eo magis ad ipſiuſmet celeri-
              <lb/>
            tatem accedat. </s>
            <s xml:id="echoid-s6268" xml:space="preserve">Unde illud ſequebatur denique, etiam ap-
              <lb/>
            pendices ſive brachia Saturni, vel medio globoſo corpori
              <lb/>
            conjuncta atque affixa, ſimul cum eo volvi, vel, interval-
              <lb/>
            lo aliquo diſcreta, non multo tamen lentiorem periodum
              <lb/>
            ſortita eſſe.</s>
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