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geocentric, astronomer, treatises, almagest, constellations, craters
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heliocentric, scientific revolution, orbits, initiator, church, theories
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mathematics, colorful, tychonic, sun, instruments, supernova
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engineer, philosophy, physics, telescope, compass, moons, dialogue, heliocentric
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three laws, elliptical, cubed distance, motion, heliocentric, gravity
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Invented by Hans Lippershey.
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Telescope, physics, gravity, calculus, stars, motion
