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

Table of Notes

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            <s xml:id="echoid-s6766" xml:space="preserve">
              <pb o="585" file="0321" n="338" rhead="SYSTEMA SATURNIUM."/>
            nus in gr. </s>
            <s xml:id="echoid-s6767" xml:space="preserve">18. </s>
            <s xml:id="echoid-s6768" xml:space="preserve">♓, hoc eſt 2{1/2} gr. </s>
            <s xml:id="echoid-s6769" xml:space="preserve">à loco æquinoctii, quæ di-
              <lb/>
            ſtantia dat declinationem gr. </s>
            <s xml:id="echoid-s6770" xml:space="preserve">unius.</s>
            <s xml:id="echoid-s6771" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6772" xml:space="preserve">Ut igitur ſecundum hæc de rotunda phaſi judicium ſera-
              <lb/>
              <note position="right" xlink:label="note-0321-01" xlink:href="note-0321-01a" xml:space="preserve">Saturnus
                <lb/>
              brachiorum
                <lb/>
              expers futu-
                <lb/>
              rus quo mo-
                <lb/>
              do cognoſca-
                <lb/>
              tur.</note>
            tur, illud in primis reſpicere oportet, quod gradibus ab æ-
              <lb/>
            quinoctio ſuo, hoc eſt, à gr. </s>
            <s xml:id="echoid-s6773" xml:space="preserve">20{1/2}. </s>
            <s xml:id="echoid-s6774" xml:space="preserve">♍ vel ♓, Saturni locus ec-
              <lb/>
            centricus abſit. </s>
            <s xml:id="echoid-s6775" xml:space="preserve">Ac mihi quidem phænomena antecedentia
              <lb/>
            expendenti, videtur ita ſtatuendum, ut quoties non amplius
              <lb/>
            quam 6 gr. </s>
            <s xml:id="echoid-s6776" xml:space="preserve">circiter in alterutram partem, à dictis locis Sa-
              <lb/>
            turni locus ex Sole diſtabit, nunquam brachia ejus conſpici
              <lb/>
            queant, quicunque demum oculi noſtri ſitus fuerit; </s>
            <s xml:id="echoid-s6777" xml:space="preserve">hoc eſt,
              <lb/>
            nulla ducta ratione Saturni loci apparentis. </s>
            <s xml:id="echoid-s6778" xml:space="preserve">Quod tamen
              <lb/>
            ita accipiendum eſt, ſi perſpicillis non melioribus quam qui-
              <lb/>
            bus Galilæus & </s>
            <s xml:id="echoid-s6779" xml:space="preserve">Gaſſendus uſi ſunt Saturnus inſpiciatur. </s>
            <s xml:id="echoid-s6780" xml:space="preserve">Nam
              <lb/>
            ſi noſtris ſimilia adhibeantur, forſitan jam in illa 6 graduum
              <lb/>
            diſtantia tenue quoddam brachiorum exordium percipi poſ-
              <lb/>
            ſit. </s>
            <s xml:id="echoid-s6781" xml:space="preserve">Certè anno 1656, 13. </s>
            <s xml:id="echoid-s6782" xml:space="preserve">Oct. </s>
            <s xml:id="echoid-s6783" xml:space="preserve">renata illa vidimus, cum
              <lb/>
            Saturni locus ex Sole tantum gradibus 6. </s>
            <s xml:id="echoid-s6784" xml:space="preserve">46′. </s>
            <s xml:id="echoid-s6785" xml:space="preserve">æquinoctii ſui
              <lb/>
            punctum prætergreſſus eſſet. </s>
            <s xml:id="echoid-s6786" xml:space="preserve">Erant autem æquè conſpicua
              <lb/>
            ferè atque ante phaſin rotundam, anno 1655. </s>
            <s xml:id="echoid-s6787" xml:space="preserve">At ii qui mi-
              <lb/>
            noribus teleſcopiis eum tunc obſervitabant, ut Joh. </s>
            <s xml:id="echoid-s6788" xml:space="preserve">Hodier-
              <lb/>
            na, penè adhuc rotundum repererunt: </s>
            <s xml:id="echoid-s6789" xml:space="preserve">ait enim is, tantum
              <lb/>
            tenuiſſimos quoſdam veluti radios utrinque è lateribus Sa-
              <lb/>
            turnum vibrare viſum. </s>
            <s xml:id="echoid-s6790" xml:space="preserve">Quamobrem noſtris teleſcopiis for-
              <lb/>
            taſſe arctiores paulò prædicti limites ſumendi ſint; </s>
            <s xml:id="echoid-s6791" xml:space="preserve">quod ta-
              <lb/>
            men minimum quid erit, ſequentiumque annorum expe-
              <lb/>
            rientiâ definiendum.</s>
            <s xml:id="echoid-s6792" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s6793" xml:space="preserve">Rurſus cum amplius 9. </s>
            <s xml:id="echoid-s6794" xml:space="preserve">gradib. </s>
            <s xml:id="echoid-s6795" xml:space="preserve">vel forſan ſupra 8. </s>
            <s xml:id="echoid-s6796" xml:space="preserve">gr. </s>
            <s xml:id="echoid-s6797" xml:space="preserve">ſo-
              <lb/>
            lum, ab æquinoctiis ſuis ſive 20{1/2} gr. </s>
            <s xml:id="echoid-s6798" xml:space="preserve">♍ aut ♓ locus Saturni
              <lb/>
            eccentricus diſtare invenietur, jam inde brachiis anſiſve præ-
              <lb/>
            ditum dicemus: </s>
            <s xml:id="echoid-s6799" xml:space="preserve">nullâ ne hic quidem apparentis loci conſi-
              <lb/>
            deratione, quoniam hinc jam apparens locus & </s>
            <s xml:id="echoid-s6800" xml:space="preserve">eccentricus
              <lb/>
            ab eadem parte loci æquinoctialis habentur; </s>
            <s xml:id="echoid-s6801" xml:space="preserve">ac propterea ea-
              <lb/>
            dem annuli ſuperficies, per ea quæ ſupra demonſtrata ſunt,
              <lb/>
            Soli & </s>
            <s xml:id="echoid-s6802" xml:space="preserve">viſui noſtro obverſa eſt, idque ita ut Sol plus tribus
              <lb/>
            gr. </s>
            <s xml:id="echoid-s6803" xml:space="preserve">ſupra ipſam elevatus ſit, viſus vero noſter ut minimum
              <lb/>
            gr. </s>
            <s xml:id="echoid-s6804" xml:space="preserve">uno: </s>
            <s xml:id="echoid-s6805" xml:space="preserve">quo fit ut brachia ſaltem tenuia animadverti de-
              <lb/>
            beant.</s>
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