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Solar system, Theory, universe, astronomy, geocentric
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Sun centered, mathematician, scientific, revolution, heliocentric
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Comets, astronomy, founder, development, instruments, measuring
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Telescope,inventions, temperature, astronomy, modifying, stars
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Advanced, mathematician, heliocentric, planetary motion, orbit
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Hans Lippershey invented the telescope. It was used for studying the sky and stars, and military purposes.
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Laws, gravitation, motion, light, telescope, inventions
