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

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        <div xml:id="echoid-div274" type="section" level="1" n="135">
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            <s xml:id="echoid-s5216" xml:space="preserve">
              <pb o="525" file="0253" n="266" rhead="DE SATURNI LUNA."/>
            ſe ſenſerit. </s>
            <s xml:id="echoid-s5217" xml:space="preserve">Hoc enim ultrò fatetur. </s>
            <s xml:id="echoid-s5218" xml:space="preserve">Præter Rheitam verò nemo quod ſciam ſimile quid de Saturno prodi- dit. </s>
            <s xml:id="echoid-s5219" xml:space="preserve">Nam gemini illi quos Galilæus detexerat latero- nes longè aliud eſſe deprehenſi ſunt quàm prima ſpe- cie videbantur. </s>
            <s xml:id="echoid-s5220" xml:space="preserve">Quid tamen ſint in incerto eſt, ne- que adhuc pronunciare audent Aſtronomi. </s>
            <s xml:id="echoid-s5221" xml:space="preserve">Cæterùm mihi novum Saturniæ lunæ phænomenon ad hæc quo- que viam aperuit, tandemque cauſam reſcivimus, cur interdum inter binas veluti anſas Saturnus medius te- neatur, alias recta quaſi brachia protendat, tum non- nunquam omnibus amiſſis rotundus inveniatur, qualis anno 1642. </s>
            <s xml:id="echoid-s5222" xml:space="preserve">ſpectatus fuit, jamque rurſus trimeſtri ſpa- tio perſtitit. </s>
            <s xml:id="echoid-s5223" xml:space="preserve">Et harum quidem viciſſitudinum tempo- ra in futurum definire non erit difficile ſi duorum ad- huc menſium obſervationibus attendere licuerit, quæ vi- dendum an hypotheſi noſtræ conſentiant. </s>
            <s xml:id="echoid-s5224" xml:space="preserve">Expectamus enim ut ſub finem Aprilis, ſi non ante, brachia Sa- turno renaſcantur, non curva illa, cujuſmodi à Franc.</s>
            <s xml:id="echoid-s5225" xml:space="preserve"> Fontana & </s>
            <s xml:id="echoid-s5226" xml:space="preserve">Hevelio depicta cernuntur, ſed ſecundùm lineam rectam utrimque prominentia, ſi quis melioris notæ perſpicillo intueatur. </s>
            <s xml:id="echoid-s5227" xml:space="preserve">Nam vulgaria ſi adhibeat bi- nos orbiculos referent, ſicuti Galilæo primum ſeſe ob- tulere. </s>
            <s xml:id="echoid-s5228" xml:space="preserve">Noſtrum, quo Saturni aſſeclam reperimus, quin- quagies diametrum rei viſæ multiplicat, duodenos pe- des æquans: </s>
            <s xml:id="echoid-s5229" xml:space="preserve">cui poſtea duplum longitudine conſtruxi- mus, multiplicatione centupla. </s>
            <s xml:id="echoid-s5230" xml:space="preserve">Cum autem longiora etiam hiſce Teleſcopia, utpote triginta & </s>
            <s xml:id="echoid-s5231" xml:space="preserve">quadraginta pedum ab aliis fabricari dicantur, aliquid aut vitris vi- tii ineſſe, aut hæc eadem non debita proportione mu- tuò reſpondere credibile eſt. </s>
            <s xml:id="echoid-s5232" xml:space="preserve">Neque enim alias huc- uſque aciem eorum effugiſſet novus Saturni ſatelles.</s>
            <s xml:id="echoid-s5233" xml:space="preserve"/>
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            <s xml:id="echoid-s5234" xml:space="preserve">Obſervationes præterito præſentique anno collectas,
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            quibus periodus ipſius demonſtratur, tunc unà edituri
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            ſumus cum integrum Saturni ſyſtema perfecerimus. </s>
            <s xml:id="echoid-s5235" xml:space="preserve">Cu-
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            jus interea ſummam ſequenti grypho conſignare </s>
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