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formulated a helicenter model of universe
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accurate and comprehensive astronomicial
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a stronimical teliscope
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kinematics
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discovered 4 satelites for saturn
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universal laws of motion
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haleys commet
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publishing on asronomical catalogue
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discovered the planet uranus
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harvard classification scheme
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theory of relativity
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extagalactic astronomy
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creator of arecibo message
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spread science through writings
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black holes producing radiation
