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invented theory; geocentric universe. star list
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heliocentric, astronomer, scientific revolution, orbit, controversial
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mathematician, ticonic model, instruments, supernovas, revolve
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three laws, models, elliptical, heliocentric, revolve
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Dutch inventer, Hans Lippershey first invented the telescope
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astronomer, mathematician, physics, telescope, sun spots
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telescope, law of motion, refracting light
