Astronomy_college_course#Ptolemy.2C_Copernicus_and_Tycho_systems
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The Ptolemaic system was geocentric.
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The Ptolemaic system was heliocentric.
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Most ancient Roman and most medieval scholars thought the Earth was flat.
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Evidence for the Copernican system is that the Earth does not seem to move.
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The ancient Greeks believed in circular orbits, causing them to devise the epicycle and the deferent.
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Copernicus was a university-trained Catholic priest dedicated to astronomy.
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Tycho Brahe argued that the large mass of Earth rendered it incapable of moving so quickly around the Sun.
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Tycho Brahe argued that the small mass of Earth rendered it incapable of moving so quickly around the Sun.
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Copernicus shared his heliocentric theory with colleagues decades before he died.
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In the late 16th century, Tycho Brahe invented his system to resolve philosophical and what he called “physical" problems with the heliocentric theory.
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An argument used to support the geocentric model held that heavenly bodies, while perhaps large, were able to move quickly.
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Tycho tended to favor religious arguments over scientific arguments when justifying his opinions about the geocentric/heliocentric controversy.
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Tycho proposed an earth-orbiting sun with the planets in orbit around that moving Sun.
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Tycho argued against the concept of an earth-orbiting sun with the planets in orbit around that moving Sun.
