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Feb 19, 1473
Nicolaus Copernicus's Birth
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Mar 3, 1541
Coppernicus published a short austronomical manuscript
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Feb 15, 1564
Galileo Galilei's Birth
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Galileo Published his letters about sunspots based on observations he made
Proves the universe isn't perfect -
Galileo Publishes Dialogue concerning the two chief world systems
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Isaac Newton's Birth
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Edwin Hubble's Birth
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Hubble's law is published