Clavius, Christoph - In Sphaeram Ioannis de Sacro Bosco commentarius

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179142Comment. in I. Cap. Sphæræ ni HI: ponaturq; primũ terra in cẽtro A. Perſpicue igitur uides, ortũ æquino-
ctialẽ B, & occaſum C, per lineã rectam B C; ortũ uero æſtiuum F, & occaſum
hyemalẽ I, ſecundum rectam lineam F I; ortum deniq. hyemalem H, & occa-
ſum æſtiuum G, per lineam rectã GH,

60[Figure 60] ſibi mutuo reſpondere; vt res poſtulat.
Quod quidẽ phænomena Aſtronomo-
rũ teſtantur, aſſumiturq. ab Euclide in
principio φαινομένων vt certiſſimũ, aſ-
ſeriturque à Plinio lib. 2. c. 71. ex ſentẽ
tia omniũ Aſtrologorũ. Collocetur de
inde terra in axe mũdi extra Aequato-
rẽ, nẽpe in K. Quo poſito, luce clarius
cõftat, totũ oppoſitũ accidere. Occaſus
enim hyemalis I; per lineam rectã, quæ
per terrã extenditur, nõ amplius reſpõ-
debit ortui æſtiuo F, ſed puncto L: Simi
liter occaſus æſtiuus G, puncto M, non
antem ortui hyemali H, reſpondebit.

Si deniqve terra nec in plano Aequinoctialis circuli, nec in a@e-
mundi eſſet poſita, ſed alibi, in omnia prædicta abſurda incideremus, vt facile
quiuis ex ijs, quæ dicta ſunt, deducere poteſt. In ſphæra enim recta nullum fie-
ret æquinoctium, & in ſphæra obliqua ille tantum Horizon ſecaret ſphæram
per æqualia, qui tranſiret per centrum mundi; Confundereturq́ue vniuerſa ſe
ries in decrementis dierum, ac noctium, & c.

Secvnda ratio deſumpta etiam ex Ptolemæo loco citato, qua quoq.
11Alia ratio
Ptolemæi
probãs ter-
ram in me-
dio mundi
eſſe. vtitur Auerrores lib. 2. de cœlo, eſt talis. Si terra uon eſſet in medio mundi ſita,
non fierent eclipſes Lunæ ſemper, quando duo luminaria per diametrũ oppo-
nuntur, ſed plerunq. contingerent,

61[Figure 61] quando nõ exiſtunt in locis Zodiaci
oppoſitis, quod falſum eſt. Teſtatur
ſiquidem experientiæ Aſtronomorũ,
tum demũ fieri eclipſim Lunæ & ſem
per, quando Luna Soli opponitur,
aliàs nunquam. Sit enim centrum
mundi A, in quo ſi ponatur terra,
manifeſtum eſt eclipſim fieri, quan-
do luminaria per diametrum oppo-
nuntur, quia nimirum tunc ipſa ter-
ra interponitur inter vtrũque; Quã-
do uero non ſunt per diametrum
oppoſita, nullam poſſe eſſe eclipſim.
Nam terra non poteſt tunc eſſe im-
pedimento, quò minus Luna à Sole illuſtretur. Quòd ſi terra extra centrum
ſedem habeat, vt in B, poterunt duo luminaria in punctis Zodiaci oppoſitis
exiſtere, & tamen nulla fieri eclipſis, quòd terra non reperiatur in illa mundi
diametro, ſecundum quàm opponuntur. Immo Luna patietur eclipſim, vt plu-
rimum, quando minus à Sole diſtat, quàm ſemicirculo. Ac breuiter, Lunæ de-
ſectus tunc demum in oppoſitis per ſemicirculum locis fieri poteſt,

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