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Nicolus Copernicus is born in Torun, Poland.
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Nicolus Copernicus died.
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Nicolus Copernicus published his astronomical manuscript.
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Galileo is born in Pisa, Italy.
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Galileo invented a new and powerful telescope.
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Galileo published his letters about sunspots based on observations he made.
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Galileo dies due to natural causes.
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Newton dies.
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Newton's book about mathematical principles of natural philosophy is published.
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Ewdin Hubble is born in Marshfield, Missouri.
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Ewdin Hubble demonstrates that there galaxies beyond the Milky Way.
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Hubble laws sre identified and show that the universe is expanding.
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Edwin Hubble dies of a heart attack.