Fabri, Honoré
,
Dialogi physici in quibus de motu terrae disputatur
,
1665
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fuit, antequam motu circulari moveretur ad Eclipticam, eo modo, quo iam
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ſupra dictum eſt. </
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Auguſtin.
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"> Qua quæſo linea, curva an recta? </
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">deinde an perpen
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diculariter cadente in planum Eclipticæ? </
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<
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">an verò in planum Æqua
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toris? </
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Antim.
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"> Ad vtrumque reſpondeo; ad primum quidem, per curvam fieri;
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vt dixi de Sole v.g. per arcum D.
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F, vt eandem retineat à centro
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mundi diſtantiam, vi ſcilicet hujus
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motus, ſeu inclinationis; quænam
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verò ſit accelerationis ratio à D ver
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sùs F, iam ſupra indicavi. </
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horizontale planum AF & ſuperfi
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ciem ſphæræ inclinatam DF, in
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qua deſcendat corpus grave motu
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accelerato, hæc eſt accelerationis
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progreſſio; quæ in ſecundam incli
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nationem apprimè quadrat;
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quænã
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porrò & qualis ſit hæc progreſſio
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motus accelerati, altioris eſt indagi
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nis; Licèt enim
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eadẽ
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<
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nõ
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ſit cum illa,
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quam ſervant funependula in de
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ſcenſu, ab ea tamen petenda eſt;
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Vt vt ſit, hæc diſcuſſio hujus noſtri
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inſtituti non eſt, ad ſecundum re
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ſpondeo, Lineam illam cadere per
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pendiculariter in planum Æquato
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ris,
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determinatur à Plano cir
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culi parallelo Plano Æquatoris, eius
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tamen terminus eſt Ecliptica, vt di
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xi; nempe Plánetæ hinc terram aſpi
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ciunt, cui ſerviunt, lumenque refun
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dunt; inde verò Solem, ſub primo reſpectu, ſuos orbes agunt circa -
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terram, tanquam circa ſuum centrum; ſub alio verò, Solis ſequun
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tur veſtigia, qui cùm ab Ecliptica nunquam diſcedat, hic ſolus circulus
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ſecundam inclinationem Planetarum tanquam terminus determinat. </
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his autem perſpicuas rationes reddo, in mea hypotheſi, acceleratio
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nis, retardationis, retrogreſſionis, ſtationis, Nodorum motus, itemque
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Apogæi & Perigæi, variæ digreſſionis & latitudinis, vt jam ſupra indicavi
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mus. </
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Chryſoc.
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<
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"> Antequam alia argumenta expromas, per te mihi liceat,
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Antime, vnum quidpiam, quod jam in mentem venit, breviter expo
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nere; ſcilicet in Copernicana hypotheſi, cuncta fetè gratis, vt aiunt,
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& ad nutum conſtruentis adſtrui, id eſt ſine vlla cauſa, vel ratione, quæ
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hoc, vel illud fieri poſtulet; v.g. terram moveri volunt in excentrico; cur </
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