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

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            <s xml:id="echoid-s6919" xml:space="preserve">
              <pb o="591" file="0327" n="344" rhead="SYSTEMA SATURNIUM."/>
            mediocri. </s>
            <s xml:id="echoid-s6920" xml:space="preserve">Sol autem hîc apparet diametro 30′, 30″. </s>
            <s xml:id="echoid-s6921" xml:space="preserve">Ergo
              <lb/>
            Jovialis diametri ad Solarem hæc proportio erit quæ 5′,
              <lb/>
            35″ ad 30′, 30″, hoc eſt paulo major quam 1 ad 5{1/2}.</s>
            <s xml:id="echoid-s6922" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6923" xml:space="preserve">Accuratè etiam diametrum Veneris dimenſus ſum, ea
              <lb/>
              <note position="right" xlink:label="note-0327-01" xlink:href="note-0327-01a" xml:space="preserve">Veneris dia-
                <lb/>
              meter appa-
                <lb/>
              rens.</note>
            quam poſtmodum exponam methodo, invenique cum ter-
              <lb/>
            ris proxima eſt, non majorem fore quam octoginta quinque
              <lb/>
            ſecundorum ſcrupulorum. </s>
            <s xml:id="echoid-s6924" xml:space="preserve">Eſt autem diſtantia hæc Veneris
              <lb/>
            perigææ ad mediam Solis à Tellure diſtantiam circiter ut 21
              <lb/>
            ad 82. </s>
            <s xml:id="echoid-s6925" xml:space="preserve">Ergo ſi apud Solem Venus conſiſteret appareret ejus
              <lb/>
            diameter duntaxat 21″, 46″′. </s>
            <s xml:id="echoid-s6926" xml:space="preserve">Unde conſtat ita eſſe diame-
              <lb/>
            trum Veneris ad Solis diametrum ut 21″, 46″′ ad 30′, 30″,
              <lb/>
            hoc eſt ut 1 ad 84.</s>
            <s xml:id="echoid-s6927" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s6928" xml:space="preserve">At Martis diametrum terris proximi non excedere 30″ de-
              <lb/>
              <note position="right" xlink:label="note-0327-02" xlink:href="note-0327-02a" xml:space="preserve">Martis diæ
                <unsure/>
              -
                <lb/>
              meter.</note>
            prehendi, etſi obſervatione non tam exacta quam qua in Sa-
              <lb/>
            turno, Jove & </s>
            <s xml:id="echoid-s6929" xml:space="preserve">Venere uſus ſum, quippe cujus rationem no-
              <lb/>
            viſſimo Martis ad Tellurem acceſſu nondum inveneram. </s>
            <s xml:id="echoid-s6930" xml:space="preserve">Un-
              <lb/>
            de quum diſtantia Martis minima ſit ad mediocrem Solis ut
              <lb/>
            15 ad 41; </s>
            <s xml:id="echoid-s6931" xml:space="preserve">colligitur ratio diametri Martis ad diametrum So-
              <lb/>
            lis ea circiter quæ 1 ad 166. </s>
            <s xml:id="echoid-s6932" xml:space="preserve">Mars itaque duplo minor Ve-
              <lb/>
            nere ſecundum diametrum hac ratione efficitur. </s>
            <s xml:id="echoid-s6933" xml:space="preserve">Atque adeo
              <lb/>
            manifeſtum eſt in Planetis non ubique eum ſervari ordinem,
              <lb/>
            ut qui remotiores à Sole ſunt iidem quoque majori ſint mo-
              <lb/>
            le: </s>
            <s xml:id="echoid-s6934" xml:space="preserve">nam & </s>
            <s xml:id="echoid-s6935" xml:space="preserve">Jovis ſphæra Saturno ſine annulo major inventa
              <lb/>
            eſt. </s>
            <s xml:id="echoid-s6936" xml:space="preserve">Quo fit ut minus liquido de Terræ ad cæteros Plane-
              <lb/>
            tas proportione æſtimatio iniri poſſit. </s>
            <s xml:id="echoid-s6937" xml:space="preserve">Nam ſi pro ratione
              <lb/>
            ordinis magnitudines eſſent attributæ, ut Saturnus Jove
              <lb/>
            major eſſet, Jupiter Marte, hic Venere, hæc Mercurio;
              <lb/>
            </s>
            <s xml:id="echoid-s6938" xml:space="preserve">inde quidem penè certo colligere liceret, Telluris magnitu-
              <lb/>
            dinem eſſe inter Martem Veneremque mediam. </s>
            <s xml:id="echoid-s6939" xml:space="preserve">Cum verò
              <lb/>
            in aliquibus contrarium deprehendatur, non æquè quid ſe-
              <lb/>
            quendum ſit apparet. </s>
            <s xml:id="echoid-s6940" xml:space="preserve">Veruntamen ut quatenus fieri poteſt
              <lb/>
            totius ſyſtematis concinnitas obſervetur, id nunc quoque
              <lb/>
            maximè conſentaneum videtur, ut ſicut loco media Terra
              <lb/>
            eſt inter Martem & </s>
            <s xml:id="echoid-s6941" xml:space="preserve">Venerem, ita quoque ſit magnitudine. </s>
            <s xml:id="echoid-s6942" xml:space="preserve">
              <lb/>
            Martis diametrum diximus diametri Solis eſſe {1/100}; </s>
            <s xml:id="echoid-s6943" xml:space="preserve">Veneris
              <lb/>
            vero diametrum {1/14}. </s>
            <s xml:id="echoid-s6944" xml:space="preserve">Inter utramque mediam igitur terræ </s>
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