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Feb 19, 1473
Nicoalus Copemicus's birthday
He was Born -
Period: Feb 19, 1473 to
evolution starts
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Feb 15, 1564
Gailieo is born
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died- Galileo
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Edwin Hubble
His birthday -
Joins the staff if the Mount Wilson Observatory - Hubble
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spotted Cepheid variable- Hubble