Clavius, Christoph
,
In Sphaeram Ioannis de Sacro Bosco commentarius
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Comment. in IIII. Cap. Sphæræ
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centrici, quàm in oppoſito Augis. </
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<
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xml:space
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">Immerſus igitur erit intra craſſitiem Eccen
<
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trici Epicyclus, ad cuius motũ planeta reuoluatur. </
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<
s
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xml:space
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">Ita enim nullo labore præ-
<
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dictæ diuerſitatis cauſam reddemus. </
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<
s
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xml:space
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">Sit enim Zodiacus, cui cẽtrum idem cum
<
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centro mundi ſit A; </
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>
<
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xml:space
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">Eccentricus uero deferens planetam ſit BCDE, cuius cen-
<
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trum F, à mundi centro diuerſum; </
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>
<
s
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xml:space
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">Aux Eccentrici ſit B, & </
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<
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xml:space
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">oppoſitum Augis D.
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</
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<
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Quod ſi Luna v.</
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<
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xml:space
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">ſolum in hoc Eccen-
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trico moueretur, proculdubio in Au-
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ge B, remotiſſima ſemper à nobis cer-
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neretur, & </
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<
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xml:space
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<
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xml:space
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">In oppoſito ue-
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ro Augis D, propinquiſſima nobis, & </
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<
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<
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maxima perpetuo appareret. </
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<
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xml:space
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">Cuius
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contrarium accidere deprehenſum eſt
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ab Aſtronomis. </
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<
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xml:space
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">At poſito Epicyclo
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G H I, in quo planeta affigatur in
<
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pancto G, uel I, liquido conſtat, Lu-
<
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nam, (quod de alijs etiam planetis in
<
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telligas.) </
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>
<
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xml:space
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preserve
">quamuis in Auge Eccen-
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trici, vel oppoſito Augis extiterit, ta-
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men quia tunc reperitur v.</
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>
<
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xml:space
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<
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xml:space
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">in Epicy-
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clo ad punctum G, remotiorem à no-
<
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bis apparere, quàm cum in Epicyclo
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ad punctum I, extiterit. </
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>
<
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xml:space
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">Sed dicet for-
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taſſe aliquis, fruſtra conceſſos eſſe Ec-
<
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centricos, ſi per Epicyclum tueri poſſumus, planetas modoà terra eſſe remo-
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tiores, modo minus diſtantes. </
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<
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xml:space
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">Cui reſpondendum eſt, quemadmodum per ſo-
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lum Eccentricum hęc apparentia defendi non poteſt, ut diximus, ita quoque
<
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eandem per ſolum Epicyclum defendi non poſſe. </
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<
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xml:space
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">Compertum namque eſt
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à Mathematicis, Lunam v.</
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<
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">g. </
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<
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xml:space
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">exiſtentem in puncto Epicycli G, à terra remotiſ-
<
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ſimo, non ſemper eandem à terra habuiſſe diſtantiam, neque eiuſdem ſemper
<
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apparuiſſe magnitudinis. </
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>
<
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xml:space
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">Quod idem accidere cognouerunt, dum Luna in
<
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puncto Epicycli I, terræ proximo exiſtebat. </
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<
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xml:space
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">Idemque in alijs planetis obſer-
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uarunt. </
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<
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xml:space
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">Neceſſe igitur eſt, Epicyclum deferri in orbe Eccentrico, non autem
<
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in concentrico, ut tanta diuerſitas locum inueniat. </
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<
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xml:space
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">Quare non fruſtra in pla-
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netis, præter Epicyclum, Eccentricus conſtituitur, cum vterque orbis neceſſa-
<
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rius ſit, ut præd@ctam apparentiam tueamur. </
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<
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xml:space
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">Vidi ego certe paucis annis ela-
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pſis Martem tanta magnitudine, ut duplo tunc maior cœlo ſereniſſimo appa-
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reret, quàm alio tempore, & </
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">multi mirarentur exiſtimantes, nouum in cœlo ſy
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dus effulſiſſe. </
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<
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xml:space
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">Quod idcirco dixerim, ut ſtudioſus lector videat, tam illuſtrem
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eſſe hanc apparentiam de magnitudine planetarum, quæ ſine Eccentricis & </
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Epicyclis defendi non poteſt, ut ſponte ſeſe oculis noſtris interdum obijciat ſi-
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ne miniſterio inſtrumentorum.</
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<
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">II. </
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<
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planetæ, præter Solem, exiſtentes in Auge Eccentrici, quã-
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<
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">II.
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Apparentia
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probant da
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@i Epicyclos</
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uis ex ſe ibi tardius moueantur reſpectu centri terrę, ut ſupra de Sole eſt di-
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ctum, tamen aliam adhuc ibi deprehenſi ſunt habere irregularitatem. </
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<
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na v.</
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<
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<
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">aliquando uelocius in Auge, aliquando tardius uiſa eſt moueri. </
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<
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que in Augis oppoſito compertum eſt: </
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<
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">ita ut Luna aliquando in Zodiaco per-
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currat uno die ferme grad. </
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<
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">15. </
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<
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">alio uero die tantum grad. </
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<
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<
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ficut per ſolum Eccentricum defendi nequit, (alias namque eadem </
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