AST101H1 Chapter Notes - Chapter 1: De Revolutionibus Orbium Coelestium, Semi-Major And Semi-Minor Axes, Ellipse
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AST101H1 Full Course Notes
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Born in torun, poland, february 19th, 1473. Wealthy family, educated in math, medicine, and law. Grew up with inaccurate ptolemaic model of universe. Used aristarchus"s model to develop heliocentric model, as well as calculate orbital periods and distance from sun for planets. Copernicus published his ideas in, de revolutionibus orbium coelestium (on the revolutions of the heavenly spheres) and died may 24th, 1543. Due to circles in circles theory or orbits, his model was not more accurate nor less complex than that of ptolemy. Made observations about planetary alignment, and compiled observations about positions. Observed a nova (new star) in 1572, contradicting beliefs of unchanging heavens. We know now that tycho saw a star explosion, supernova, and he was given money to continue making such observations. Tycho made accurate measurements and observations, but concluded the earth was still stationary, while other planets orbited the sun. While tycho could not explain planetary motion accurately, kepler did.
