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

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1mundi: adeò vt, quemadmodum axiculus globuli
continuatus, & circumductus, intelligitur per me­
dium muſæoli ſpatium deſcribere quaſi columnam,
cuius baſes ſint memorati in parietibus circuli; ita
intelligere liceat immanem quandam quaſi colum­
nam per magni orbis ſpatia ab axe Terræ conti­
nüato, circumductoque deſcribi, cuius baſes ſint
circuli illi iam repetiti in Firmamenti fornice. Quintò,
denique huiuſmodi motum, ſiue continentiam in
paralleliſmo ita fieri, vt tantillum tamen, ſeu inſen­
ſibiliter lentior ſit ipſo motu centri; efficiaturque,
vt centro Terræ ad idem æquinoctiale punctum re­
deunte, æquator ſecet Eclipticam nonnihil cite­
rius, ac faciat cum illa angulum inclinationis, ſeu
declinationis maximum, aliquantò antecedenter.
Non quòd angulus inclinationis non ſit ſemper idem,
aut æqualis, quódque æquator Terræ, axiſque ip­
ſius non ſit ſemper ſibi ipſi parallelus; ſed quòd
huiuſmodi angulus, ſiue interſectio ſit mobilis,
fiatque ſenſim in aliis, aliiſque Eclipticæ punctis
(idque regrediendo, ſiue procedendo contra ſigno­
rum ſeriem, hoc eſt ab Ariete in Piſces, aut à Li­
bra in Virginem) quódque Ecliptica exſiſtente im­
mobili, tum æquatoris planum per ipſam decur­
rere intelligatur; tum poli æquatoris ſeu mundi
intelligantur lentè moueri, idque regrediendo circa
polos Eclipticæ, ſeruatâ ſemper eadem diſtantiâ.
Quî id fieri valeat, vt poſſis quadamtenùs concipere,
duc etiam circellum in memorato globulo, qui
repręſentet Eclipticam, & æquinoctiale eius pun-

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