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
.
Solar spots are
bigger
than all
ſia
and Affrick.
* 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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