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

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            <s xml:id="echoid-s9503" xml:space="preserve">
              <pb o="696" file="0436" n="455" rhead="CHRISTIANI HUGENII"/>
            re, non perinde, ac adjacentes terræ, lucidum apparet.
              <lb/>
            </s>
            <s xml:id="echoid-s9504" xml:space="preserve">Credebam nimium Veneris fulgorem in cauſa eſſe, quo mi-
              <lb/>
            nus diverſitas lucis animadverti poſſet. </s>
            <s xml:id="echoid-s9505" xml:space="preserve">Sed cum fumo infe-
              <lb/>
            ciſſem vitrum oculo proximum, ad auferendam, partem ra-
              <lb/>
            diorum, nihilo minus æqualis in tota ſuperficie lux viſa eſt. </s>
            <s xml:id="echoid-s9506" xml:space="preserve">
              <lb/>
            An igitur nulla ibi maria, an Solis lucem magis quam apud
              <lb/>
            nos aquæ, aut minus terræ repercutiunt? </s>
            <s xml:id="echoid-s9507" xml:space="preserve">an potius, (quod
              <lb/>
            credibilius mihi videtur) denſior ibi, quam in Jove aut Mar-
              <lb/>
            te, Vaporum regio à Sole illuſtrata, Veneriſque globum
              <lb/>
            circundans, omnem fere illam quam videmus lucem ad nos
              <lb/>
            remittit, vixque ſubjectorum ſibi marium terrarumque diſcri-
              <lb/>
            men percipi ſinit? </s>
            <s xml:id="echoid-s9508" xml:space="preserve">Nam certum eſt noſtram quoque atmo-
              <lb/>
            ſphæram, ſi Tellurem procul intueri daretur, plurimum ob-
              <lb/>
            ſtituram luce ſua, quo minus terræ mariſque tam diverſa cla-
              <lb/>
            ritas apparere poſſet, quam quæ cernitur ex edito ſcopulo
              <lb/>
            deſpicienti. </s>
            <s xml:id="echoid-s9509" xml:space="preserve">Eadem ratione qua Lunæ quoque maculas in-
              <lb/>
            terdiu minus aperte quam noctu animadverti ſinunt vapores
              <lb/>
            iidem; </s>
            <s xml:id="echoid-s9510" xml:space="preserve">quoniam tunc quoque inter illam oculoſque noſtros
              <lb/>
            interpoſiti, Soliſque luce illuſtres, viſui officiunt: </s>
            <s xml:id="echoid-s9511" xml:space="preserve">noctu
              <lb/>
            non item.</s>
            <s xml:id="echoid-s9512" xml:space="preserve"/>
          </p>
          <p>
            <s xml:id="echoid-s9513" xml:space="preserve">At in Marte reliquis diſci partibus obſcuriores, ut jam
              <lb/>
              <note position="left" xlink:label="note-0436-01" xlink:href="note-0436-01a" xml:space="preserve">@n Marte.</note>
            dixi, maculæ notantur. </s>
            <s xml:id="echoid-s9514" xml:space="preserve">Ex quarum recurſibus pridem fuit
              <lb/>
            obſervatum dies nocteſque illic iiſdem fere quibus apud nos
              <lb/>
            intervallis reverti. </s>
            <s xml:id="echoid-s9515" xml:space="preserve">Hyemem vero æſtatemque exiguo diſcri-
              <lb/>
            mine incolæ ſentiunt, eo quod axis diurnæ converſionis pau-
              <lb/>
            lum duntaxat ad orbitam Planetæ inclinatur, ut ex motu
              <lb/>
            macularum intellectum eſt. </s>
            <s xml:id="echoid-s9516" xml:space="preserve">Qui autem ex globo illo Tellu-
              <lb/>
            rem noſtram intuentur, eodem modo fere, ac Venus no-
              <lb/>
            bis, apparere iis debet, formaſque lunaribus ſimiles oſten-
              <lb/>
            dere, ſi teleſcopio ſpectetur; </s>
            <s xml:id="echoid-s9517" xml:space="preserve">nec ultra gradus 48 à Sole eva-
              <lb/>
            gari; </s>
            <s xml:id="echoid-s9518" xml:space="preserve">in cujus diſco etiam conſpici quandoque poſſit, uti & </s>
            <s xml:id="echoid-s9519" xml:space="preserve">
              <lb/>
            Veneris Mercuriique corpuſcula. </s>
            <s xml:id="echoid-s9520" xml:space="preserve">Et hoc quidem nunquam
              <lb/>
            aliàs; </s>
            <s xml:id="echoid-s9521" xml:space="preserve">Venus raro iis apparere debet, uti nobis Mercurius.
              <lb/>
            </s>
            <s xml:id="echoid-s9522" xml:space="preserve">Terræ vero ſolum in Marte nigriore materia conſtare veriſi-
              <lb/>
            mile eſt, quàm in Jove, aut etiam Luna noſtra; </s>
            <s xml:id="echoid-s9523" xml:space="preserve">eoque fieri
              <lb/>
            ut rubicundior Mars ſpectetur, nec, pro ratione </s>
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