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Geocentric, intelligent, almagest, astronomy , Solar system, universe
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Intelligent, Secretive, Solar system, Sun, Astronomy, heliocentric
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Founder, Comets, atmosphere, thinker, solar system, Math
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telescope, astronomy, temperature, inventor, help family, sun
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elliptical, motion, contemporary, laws, gravity, mathematician
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laws, universal gravitation, motion, light, inventor, astronomy, founder
