Galilei, Galileo, The systems of the world, 1661

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1per ſe; but if the concluſion be falſe, a man may proceed in
finitum, and never meet with any truth already known; but
ry oft he ſhall meet with ſome impoſſibility or manifeſt

ty.
Nor need you queſtion but that Pythagoras along time
fore he found the demonſtration for which he offered the
tomb, had been certain, that the ſquare of the ſide ſubtending
the right angle in a rectangle triangle, was equal to the ſquare of
the other two ſides: and the certainty of the concluſion
ced not a little to the inveſtigating of the demonſtration,
derſtanding me alwayes to mean in demonſtrative Sciences.
But
what ever was the method of Ariſtotle, and whether his arguing à
priori preceded ſenſe à poſteriori, or the contrary; it ſufficeth that
the ſame Ariſtotle preferreth (as hath been oft ſaid) ſenſible
periments before all diſcourſes; beſides, as to the Arugments à
priori their force hath been already examined.
Now returning
to my purpoſed matter, I ſay, that the things in our times
covered in the Heavens, are, and have been ſuch, that they may
give abſolute ſatisfaction to all Philoſophers; foraſmuch as in
the particular bodies, and in the univerſal expanſion of Heaven,
there have been, and are continually, ſeen juſt ſuch accidents as
we call generations and corruptions, being that excellent
ſtronomers have obſerved many Comets generated and diſſolved
in parts higher than the Lunar Orb, beſides the two new Stars,

Anuo 1572, and Anno 1604, without contradiction much higher
than all the Planets; and in the face of the Sun it ſelf, by help

of the Teleſcope, certain denſe and obſcure ſubſtances, in
blance very like to the foggs about the Earth, are ſeen to be
produced and diſſolved; and many of theſe are ſo vaſt, that
they far exceed not only the Mediterranian Streight, but all

Affrica and Aſia alſo. Now if Ariſtotle had ſeen theſe things,
what think you he would have ſaid, and done Simplicius?
The certaixty of
the concluſion
peth by areſolutive
method to ſind the
demonstration.
Pythagoras offered
an Hecatomb for
a Geometrical
monſtration which
he found.
New ſtars
vered in Heaven.
Spots generate and
diſſolve in the face
of the Sun.
Solar spots are
bigger than all
ſia and Affrick.
SIMPL. I know not what Ariſtotle would have done or ſaid,
that was the great Maſter of all the Sciences, but yet I know in
part, what his Sectators do and ſay, and ought to do and ſay,
unleſſe they would deprive themſelves of their guide, leader, and
Prince in Philoſophy.
As to the Comets, are not thoſe Modern
Aſtronomers, who would make them Cœleſtial, convinced by

the ^{*}Anti-Tycho, yea, and overcome with their own weapons, I
mean by way of Paralaxes and Calculations, every way tryed,
concluding at the laſt in favour of Aristotle, that they are all
Elementary?
And this being overthrown, which was as it were
their foundation, have theſe Novelliſts any thing more
with to maintain their aſſertion?
* Aſtronomers
futed by
cho.
SALV. Hold a little, good Simplicius, this modern Author,
what ſaith he to the new Stars, Anno 1572, and 1604, and to

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