PAL

Ptolemaeus Arabus et Latinus

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Ptolemy, De suppositione planetarum (tr. before 1595)

Schweinfurt, SB, Ha 16 (H 85) · 19v

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magis apogeum pari celeritate moveatur centrum epicycli cuius situs sit semper in dicto eccentrico ut ad sequentia mundi et circa dictam eminentiam qua superat Solis transitus utrunque paris intervalli temporis transitum tam stellarum fixarum quae stellae ut totis noctidiis 330 ad Aegyptiacos annos restitutio⟨nes⟩ fiat 4 quam proxime. Assumitur enim ad exquisitam supputationem unius gradus sexagesima una. Rursum etiam in epicycli sphaera consideretur parvus circulus circa centrum ipsius in obliqui circuli plano, recta per utrunque centrum et illius et magis apogei duorum dictorum circa quod moveantur pari celeritate puncta semper circelli comprehendente quae vocamus apogeum et perigeum. Quin alius circulus ipsi concentricus ducatur in eodem plano et circa idem centrum pari celeritate ut distantia ad eadem cum mundi conversione absolvat parem transitum centri epicycli. Gerat autem etiam hic circellus alium sibi impositum et circa idem