Galileo -...

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Galileo, with his study of astronomy, would figure at the center of this clash.  Conservative astronomers, working without telescopes, had always ascribed to the  theory of geocentricity, which held that the earth ("geo," as in "geography" or "geology")  lay at the center of the solar system, and the sun–and the other planets–revolved  around it. Indeed, to the casual observer, it seemed common sense that the sun "rose"  in the morning and "set" at night, in its circling pattern around the earth. Ancient  authorities like Aristotle and the Roman astronomer Ptolemy had championed this  viewpoint, and the notion also coincided with the Catholic Church's view of the universe,  which placed mankind, God's principle creation, at the center of the cosmos. Thus  buttressed by common sense, the ancient philosophers, and the Church, geocentricity  seemed secure in its authority. 
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This note was uploaded on 12/14/2011 for the course HIST 2320 taught by Professor Siegenthaler during the Fall '07 term at Texas State.

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