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Isaac Newton discovers that light is made up of all of the colors of the rainbow, which are reflected by different amounts in a glass prism.
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Isaac Newton invents calculus the mathematics of change without which we could not understand the modern world.
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1609 – Johannes Kepler publishes his first two laws of planetary motion showing that planets move in orbits around the sun.
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Galileo Galilei observes Jupiter’s four largest moon
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Otto von Guericke builds a rotating sphere from which sparks fly.