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Astronomer, Geosentric, sun in the middle 100-170
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The planets revolve around the sun. 1473
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Improved the telescope, discovered super nova 1546-1603 1572- discovered super nova
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Improved telescope, discovered satellites of Jupiter 1564-1609 2009
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Elliptical orbit around sun, not circle 1571-1630 1612
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Gravity, three Newton law, reflective telescope 1642-1727
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