January 31st
1632 - Death of Joost Bürgi, Swiss clockmaker and mathematician
1868 - Birth of Theodore William Richards, American chemist, Nobel laureate
1881 - birth of Irving Langmuir, American chemist, Nobel laureate
1896 - Birth of Sofya Yanovskaya, Russian mathematician
1929 - Birth of Rudolf Mössbauer, German physicist, Nobel laureate
1958 - Explorer I - The first successful launch of an American satellite into orbit.
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February 28th
1704 - Birth of Louis Godin, French astronomer
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1867 - Charles Dillon Perrine, American-born astronomer
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1814 - Gabriel Auguste Daubrée, French geologist
Births