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Longitude + Latitude
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discovers an early trigonometric system
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Discovers heliocentric system
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Discovers elliptical orbit
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Discovers that the orbit of Mars is elliptical
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Discovers laws of gravity
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Discovers the Photoelectric effect
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.