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Astronomy Quiz 1.1 Winneconne

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Question
Answer
Showed that planets and moons stay in orbit due to gravity   Sir Isaac Newton  
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was one of the first persons to use a telescope to observe celestial bodies   Galileo Gallilei  
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developed a theory of a sun-centered universe   Copernicus  
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stated that planets move in elliptical orbits around the sun   Johannes Kepler  
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used a mural quadrant to measure the positions of planets and stars   Tycho Brahe  
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developed a theory of an Earth-centered universe in 140 CE   Ptolemy  
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proved the existence of galaxies other than the Milky Way   Edwin Hubble  
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the time required for the Earth to orbit once around the sun   Year  
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roughly the amound of time required for the moon to orbit once around the Earth   Month  
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the time required for the Earth to rotate once on its axis   Day  
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