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geocentric, astronomer, treatises, inventor, creators, wrote
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heliocentric, controversial, initiator, model, belief, waited
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tychonic, geocentric, mathematician, supernovas, astronomer, mars
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heliocentric, mathematician, telescope, moons, venus, falling
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laws, heliocentric, gravity, elliptical, books, orbit
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The telescope was invented by Hans Lippershey.
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motion, books, calculus, telescopes, gravity, light
