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July-December 1609
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Discourses and Mathematical Demonstrations, which compares copernicus's work and ptolemy's
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about mathematical principals of natural philosophy
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He proved that the universe was expanding, that there are more galexies beyond the milkyway
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Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.