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part 3 rg 1

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What is the contribution Nicholas Copernicus made?   Proposes heliocentric theory On the Revolutions of the Heavenly Spheres  
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Nicholas Copernicus Challenge to traditional way of perceiving universe   Disproves the theory of geocentric universe  
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What is the contribution Tycho Brahe made?   Builds observatory, observes comet that passes through the "crystals" between the planets and crystalline spheres  
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Tycho Brahe Challenge to traditional way of perceiving the universe?   disproves the crystalline sphere theory  
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What is the contribution Johannes Kepler made?   Discovers that planets move in elliptical orbits  
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Johannes Kepler Challenge to traditional way of perceiving the universe   Dispels the idea that planets move in perfect circular orbits  
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What is the contribution Galileo Galilei made?   Observations made through the telescope in The Starry Messenger reveal that the celestial bodies have imperfections(moon has craters, Jupiter has moons, sun has spots)  
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Galileo Gallilei Challenge to traditional way of perceiving the universe   Dispels idea that heavenly bodies are perfect/unblemished  
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What is the contribution Sir Isaac Newton made?   Formulates mechanical laws of motion to explain why planets orbit rather than fly into space or crash into the sun in Principia Mathematica (1687)  
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Sir Isaac Newton Challenge to traditional way of perceiving the universe   his idea of universal laws of motion dispels the idea that there is a separate set of laws that govern the heavens and the Earth  
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