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  Copernicus became interested in astronomy and published an early description of his "heliocentric" model of the solar system in Commentariolus
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  Copernicus gave a handwritten book to friends that showed his view of the universe.
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  Demonstrates & outlines theory of precession of equinoxes.
 A letter against werner
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  Published 'first' account to foreshadow De Revolutionibus.
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  Rheticus convinced Copernicus to allow publication of his original manuscript De Revolutionibus Orbium Coelestium
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  Compendium Musicae
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  Rene published Geometry in 1637. It was a combination of geometry and algebra. It is known as Cartesian Geometry.
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  Meditations on First Philosophy
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  Principles of Philosophy
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  Passions of the Soul
