Galilei, Galileo
,
The systems of the world
,
1661
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<
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>SALV. </
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<
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>You ſay very well; but you alledge nothing in that
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which may favour the cauſe of the
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Ptolomœans
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in the leaſt, who
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did never yet reject the motion of 36000. years in the ſtarry
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Sphere, for that the ſaid tardity would make it too vaſt and
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menſe. </
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<
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>For if that the ſaid immenſity was not to be ſuppoſed in
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Nature, they ought before now to to have denied a converſion
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ſo ſlow as that it could not with good proportion adapt it ſelf,
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ſave onely to a Sphere of monſtrous magnitude.</
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<
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>SAGR. </
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<
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>Pray you,
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Salviatus,
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let us loſe no more time in
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ceeding, by the way of theſe proportions with people that are apt
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to admit things moſt diſ-proportionate; ſo that its impoſſible
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to win any thing upon them this way: and what more
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tionate proportion can be imagined than that which theſe men
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ſwallow down, and admit, in that writing, that there cannot be a
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more convenient way to diſpoſe the Cœleſtial Spheres, in order,
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than to regulate them by the differences of the times of their
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riods, placing from one degree to another the more flow above
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the more ſwift, when they have conſtituted the Starry Sphere
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higher than the reſt, as being the ſloweſt, they frame another
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higher ſtill than that, and conſequently greater, and make it
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volve in twenty four hours, whilſt the next below, it moves not
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round under 36000. years?</
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<
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<
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>I could wiſh,
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Simplicius,
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that ſuſpending for a time
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the affection rhat you bear to the followers of your opinion, you
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would ſincerely tell me, whether you think that they do in their
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minds comprehend that magnitude, which they reject afterwards
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as uncapable for its immenſity to be aſcribed to the Univerſe.
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<
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>For I, as to my own part, think that they do not; But believe,
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that like as in the apprehenſion of numbers, when once a man
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begins to paſſe thoſe millions of millions, the imagination is
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founded, and can no longer form a conceipt of the ſame, ſo it
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happens alſo in comprehending immenſe magnitudes and
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ces; ſo that there intervenes to the comprehenſion an effect like
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to that which befalleth the ſenſe; For whileſt that in a ſerene
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night I look towards the Stars, I judge, according to ſenſe, that
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their diſtance is but a few miles, and that the fixed Stars are not a
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jot more remote than
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Jupiter
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or
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Saturn,
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nay than the Moon.
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<
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>But without more ado, conſider the controverſies that have paſt
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between the Aſtronomers and Peripatetick Philoſophers, upon
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occaſion of the new Stars of
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Caſſiopeia
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and of
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Sagittary,
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the
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ſtronomers placing them amongſt the fixed Stars, and the
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ſophers believing them to be below the Moon. </
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<
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>So unable is our
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ſenſe to diſtinguiſh great diſtances from the greateſt, though theſe
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be in reality many thouſand times greater than thoſe. </
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<
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I ask of thee, O fooliſh man! Doth thy imagination comprehend </
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