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

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            <s xml:id="echoid-s6191" xml:space="preserve">
              <pb o="561" file="0293" n="308" rhead="SYSTEMA SATURNIUM."/>
            intelliget fieri non poſſe, cum Saturni orbita tantum 3 gra-
              <lb/>
            dibus ab eclipticæ plano recedat, ut inde anſarum figuris
              <lb/>
            ulla nobis percipienda mutatio adveniat. </s>
            <s xml:id="echoid-s6192" xml:space="preserve">Cæterum nec ve-
              <lb/>
            ram quidem eſſe hanc quartam phaſin ſuperius indicavimus,
              <lb/>
            ſed cum hæc, ſive triſphærica potius, minoribus teleſcopiis
              <lb/>
            cernitur, noſtris prægrandibus illam comparere quam adno-
              <lb/>
            tavimus anno 1655 & </s>
            <s xml:id="echoid-s6193" xml:space="preserve">1657. </s>
            <s xml:id="echoid-s6194" xml:space="preserve">Quæ cum adhuc minus Heve-
              <lb/>
            lianæ hypotheſi conveniat, clarius demonſtrat illam ſcopum
              <lb/>
            non attigiſſe. </s>
            <s xml:id="echoid-s6195" xml:space="preserve">Neque ſanè vel rotundæ phaſis phænomena
              <lb/>
            ſatis congruunt præſtitutis ab Hevelio limitibus; </s>
            <s xml:id="echoid-s6196" xml:space="preserve">ut patet
              <lb/>
            non tantum ex prædictione ejus, eventu refutata, quæ fe-
              <lb/>
            rebat rotundam phaſin anni 1656 continuatum iri uique in
              <lb/>
            Menſem Septembrem anni 1657, cum tamen jam inde à 13
              <lb/>
            Oct. </s>
            <s xml:id="echoid-s6197" xml:space="preserve">1656, anſas Saturnus recuperaverit, neque poſtea a-
              <lb/>
            miſerit; </s>
            <s xml:id="echoid-s6198" xml:space="preserve">ſed & </s>
            <s xml:id="echoid-s6199" xml:space="preserve">ex Galilæi obſervatis circa rotundam phaſin
              <lb/>
            anni 1612. </s>
            <s xml:id="echoid-s6200" xml:space="preserve">Solſtitio enim hujus anni, Saturnus gr. </s>
            <s xml:id="echoid-s6201" xml:space="preserve">18, 22′.
              <lb/>
            </s>
            <s xml:id="echoid-s6202" xml:space="preserve">♓ obtinens, tricorpor adhuc Galilæo apparuit, quum per
              <lb/>
            tabulas Hevelii debuiſſet rotundus obſervari, ac viciſſim 1
              <lb/>
            Dec. </s>
            <s xml:id="echoid-s6203" xml:space="preserve">ejuſdem anni 1612, cum verſaretur in gr. </s>
            <s xml:id="echoid-s6204" xml:space="preserve">11, 27′. </s>
            <s xml:id="echoid-s6205" xml:space="preserve">♓
              <lb/>
            rotundus Galilæo repertus eſt, quo loco Hevelius triſphæri-
              <lb/>
            cum expectaſſet.</s>
            <s xml:id="echoid-s6206" xml:space="preserve"/>
          </p>
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            <s xml:id="echoid-s6207" xml:space="preserve">Alteram hypotheſin, ingenio ſuo acutiſſimo dignam,
              <lb/>
              <note position="right" xlink:label="note-0293-01" xlink:href="note-0293-01a" xml:space="preserve">Cauſæ phæ-
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              nomen@n Sa-
                <lb/>
              turni à Ro-
                <lb/>
              bervallio ex-
                <lb/>
              cogitatæ.</note>
            ſummus Geometra E. </s>
            <s xml:id="echoid-s6208" xml:space="preserve">Robervallius nobis expoſuit. </s>
            <s xml:id="echoid-s6209" xml:space="preserve">Qua
              <lb/>
            quidem Saturnum perinde ut cæteros planetas rotundum ſta-
              <lb/>
            tuit; </s>
            <s xml:id="echoid-s6210" xml:space="preserve">egredi autem è Zona ejus torrida, hoc eſt, quæ re-
              <lb/>
            ctiores ſolis radios excipit, vapores quoſdam non admo-
              <lb/>
            dum ſpiſſos, qui procul à ſuperficie ejus in ſublime evolan-
              <lb/>
            tes, undique illum ambiant, præterquam polos verſus, ubi
              <lb/>
            fortaſſis intenſum frigus eos à ſole attrahi prohibeat. </s>
            <s xml:id="echoid-s6211" xml:space="preserve">Hi ſi
              <lb/>
            quando omne ſpatium complent à Saturno ad uſque extre-
              <lb/>
            mam ipſorum regionem, elliptica forma, inquit, eum vi-
              <lb/>
            deri faciunt. </s>
            <s xml:id="echoid-s6212" xml:space="preserve">Cum vero minus denſi exoriuntur, interque
              <lb/>
            eos ac Saturnum locus ingens medius relinquitur, ob tenui-
              <lb/>
            tatem ſolares radios non reflectunt, niſi inde ubi magis con-
              <lb/>
            ferti iiſdem opponuntur; </s>
            <s xml:id="echoid-s6213" xml:space="preserve">quod noſtri reſpectu neceſſe eſt
              <lb/>
            fieri in partibus à medio diſco Saturni remotioribus. </s>
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