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Copernicus completes "On the Revolutions of the Celestial Spheres" but waits before publishing it.....(His theory)
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First astronomical Observation
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Began Observations of Venus
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Galileo publishes dialogue concerning the two chief world systems
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Publishes "Discourses and Mathematical Demonstrations"
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Proved that white light was composed of all colors
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He publishes mathematical principles of natural philosophy
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Attends and graduates the university of chicago on June 14 from 1906-1910
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Demonstrates that there are galaxies beyond the milky way
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Discovers asteroid 1373 Cancinnati
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Helped designed a telescope 1941-1948
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