Galilei, Galileo
,
The systems of the world
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1661
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may be aſligned to the Univerſe, we ſhall rather find the Sun
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placed in it, as by the ſequel you ſhall underſtand.</
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It is queſtionable
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whether deſcending
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weights move in a
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right line.
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The Earth
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cal by the
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ration of its parts
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to its Centre.
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The Sun more
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bably in the centre
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of the Vniverſe,
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than the Earth.
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>Now, like as from the conſentaneous conſpiration of all the
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parts of the Earth to form its whole, doth follow, that they with
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equal inclination concurr thither from all parts; and to unite
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themſelves as much as is poſſible together, they there ſphelically
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adapt themſelves; why may we not believe that the Sun, Moon,
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and other mundane Bodies, be alſo of a round figure, not by
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ther than a concordant inſtinct, and natural concourſe of all the
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parts compoſing them? </
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>Of which, if any, at any time, by any
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violence were ſeparated from the whole, is it not reaſonable to
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think, that they would ſpontaneouſly and by natural inſtinct
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turn? </
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>and in this manner to infer, that the right motion agreeth
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with all mundane bodies alike.</
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Natural
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tion of the parts of
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all the globes of
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the World to go to
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their centre.
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>SIMPL. Certainly, if you in this manner deny not onely the
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Principles of Sciences, but manifeſt Experience, and the Senſes
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themſelves, you can never be convinced or removed from any
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pinion which you once conceit, therefore I will chooſe rather to
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be ſilent (for,
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contra negantes principia non eſt diſputandum
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)
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than contend with you. </
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>And inſiſting on the things alledged by
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you even now (ſince you queſtion ſo much as whether grave
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ables have a right motion or no) how can you ever rationally
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ny, that the parts of the Earth; or, if you will, that ponderous
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matters deſcend towards the Centre, with a right motion;
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as, if from a very high Tower, whoſe walls are vcry upright and
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perpendicular, you let them fall, they ſhall deſcend gliding and
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ſliding by the Tower to the Earth, exactly in that very place
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where a plummet would fall, being hanged by a line faſtned above,
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juſt there, whence the ſaid weights were let fall? </
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>is not this a
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more than evident argument of the motions being right, and
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wards the Centre? </
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>In the ſecond place you call in doubt,
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ther the parts of the Earth are moved, as
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Ariſtotle
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affirms,
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wards the Centre of the World; as if he had not rationally
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monſtrated it by contrary motions, whilſt he thus argueth; The
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motion of heavie bodies is contrary to that of the light: but the
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motion of the light is manifeſt to be directly upwards, namely,
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towards the circumference of the World, therefore the motion of
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the heavie is directly towards the Centre of the World: and it
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happens
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per accidens,
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that it be towards the centre of the Earth,
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for that this ſtriveth to be united to that. </
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>The ſeeking in the
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next place, what a part of the Globe of the Sun or Moon would
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do, were it ſeparated from its whole, is vanity; becauſe that
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by that is ſought, which would be the conſequence of an
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bility; in regard that, as
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Ariſtotle
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alſo demonſtrates, the cœleſtial
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bodies are impaſſible, impenetrable, and infrangible; ſo that ſuch </
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