Gassendi, Pierre
,
De proportione qua gravia decidentia accelerantur
,
1646
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autem poſito, Stellarum mille viginti duarum diſculos
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in diſcum vnum compoſui, ipſumque ad diſcum Solis
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comparando, comperi non eſſe, niſi illius particulam
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<
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abbr
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quadringẽteſimam
">quadringenteſimam</
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trigeſimam vnam: ac proinde, dia
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metro Solis exſiſtente minutorum triginta, ratiocina
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tus ſum diametrum diſci ex omnibus Stellis compoſiti,
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non eſſe maiorem vno minuto cum ſemiſſe; quantæ
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vulgò eſſe apparet Stella magnitudinis quartæ. </
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<
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">Quod
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ſi dimidium detrahas, ob Stellas, quæ ſub horizonte:
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ſequitur diſcum ex reſiduis, non fore maiorem vna
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octingenteſima ſexageſima tertia diſci Solaris particu
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la: ac eius diametrum futuram vnius proximè minuti
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dumtaxat: hoc eſt, quantæ eſſe apparet Stella magni
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tudinis quintæ. </
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<
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id
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">Quare & ex hoc deſii admirari, quam
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obrem lux omnium Stellarum ſupra horizontem lu
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centium tam parum Terræ faciem illuſtrent; tuque ex
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inde animaduertis quo progreſſu peruenerim ad in
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credibile fig mentum. </
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<
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<
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">At verò, inquies, ecquiſ-nam capiat non
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eſſe ingens totum maius tantulâ ſui particulâ: ſeu tan
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tam, quæ apparet lucem in omnibus Stellis ſupra hori
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zontem coruſcantibus, in exiguum adeò ſpatium con
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trahi, vt non ſit eo maius, quod à ſtellula magnitudinis
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quintæ occupatur? </
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<
s
id
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">Sed nimirùm conſidera; ſi foret
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Stella, quæ reuerâ eſſet diametro minuti vnius, fore, vt
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lux eius ſpectata intra nocturnas tenebras appareret
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oculo incompa biliter maior. </
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<
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">Si enim quæ Stella eſt
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diametro ſolùm vnius ſecundi cum beſſe: apparet ni
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hilominùs diametro vnius minuti: ſanè, ſi proportio
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nem admittas, ea apparitura erit diametro minutorum </
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