Gassendi, Pierre, De motu impresso a motore translato epistulae duae, 1642

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              <s id="id.000916">
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              dant, ita vt nobis aliquando in medio exſiſtentibus
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              Sol ex vna parte ſit, illi ex aduerſa? </s>
              <s id="id.000917">Sed nempe ita
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              fieri, ac apparere neceſſum eſt, cùm remotiore exſi­
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              ſtente Terra, illos ex ipſa obſeruamus circumeunteis
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              Solem. </s>
              <s id="id.000918">Non poteſt enim Sol non haberi, eſſéque cen­
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              trum motus vtriuſque, aut vtriuſque circulus non eſ­
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              ſe Soli illigatus. </s>
              <s id="id.000919">Non poteſt vterque non videri dire­
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              ctus, cùm vltra Solem peragit iter; non retrogradus,
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              cùm citrà; non ſtationarius, cum in medio deſcenſu
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              accedit, aut in medio aſcenſu recedit, quaſi per re­
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              ctam lineam; eo modo, quo viator, qui nos procùl
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              antegreditur, vel nobis occurrit ſecundum rectam
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              viam, non apparet moueri; cùm appareat tamen, ſi
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              eodem paſſu tranſuersùm eat. </s>
              <s id="id.000920">Non poteſt Sol, tan­
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              quam centrum circuli vtriuſque non apparere conti­
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              nuò moueri per Zodiacum, iuxta ſignorum ſeriem,
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              quoniam Terra promouetur in parteis oppoſitas; ne­
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              que poteſt vtervis ſeparari longè à Sole, quia circui­
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              tum ſuum limitatum tam heinc, quàm inde, tam ſur­
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              ſum, quàm deorſum habet. </s>
              <s id="id.000921">Denique neuter poteſt
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              nos ambire, habereve Terram ſe inter, ac Solem in­
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              terpoſitam; quoniam Terra eſt extra ambitum v­
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              triuſque, & vtrumque ſemper ad eandem partem, qua
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              Solem, habet. </s>
              <s id="id.000922">Ferri porrô vtrumque Sidus ſupra, &
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              infra Solem, non verò in Epicyclo nos inter, & Solem
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              contento, memoratæque lineæ alligato, tum obſer­
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              uata noſtra conuincunt, ac præſertìm circa Mercu­
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              rium; tum præſertìm de Venere manifeſtæ eius Te
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              leſcopio phaſes. </s>
              <s id="id.000923">Nempe quòd appareat corniculata,
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              cum retrograda eſt; plena, cùm directa; id haud-du-</s>
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