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Egyptian mathematician geographer thought solar-system geocentric
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sun is actually in the middle
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Discovered super nova improved telescope
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Discovered earth orbits sun, elliptical orbit
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discovered four largest satellites of Jupiter.
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he created the laws of gravity
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.