Events
1773 - The Whirlpool Galaxy (above) was discovered by Charles Messier
1892 - Edward Emerson Barnard discovers D/1892 T1 (Barnard 3), the first comet discovered by photographic means
1976 - The first electron micrograph of an Ebola viral particle was obtained by F.A. Murphy at the C.D.C..
2003 - The Public Library of Science commences publication of an open access scientific journal, PLoS Biology.
Births
1820 - John William Dawson, Canadian geologist
1821 - Rudolf Virchow, German physician, pathologist, biologist, and politician
Deaths
1687 - Geminiano Montanari, Italian astronomer
1987 - Walter Brattain, American physicist and Nobel Prize laureate
2003 - Bertram Brockhouse, Canadian physicist and Nobel Prize laureate
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1687 - Isaac Newton publishes Philosophiae Naturalis Principia Mathematica.
1951 - William Shockley invents the junction transistor.
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Births
1633 - Geminiano Montanari, Italian astronomer
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Births
1452 - Leonardo da Vinci, Italian Renaissance polymath (above)
1552 - Pietro Cataldi, Italian mathematician
1641 - Robert Sibbald, Scottish physician
1707 - Leonhard Euler, Swiss mathematician
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1951 - Mexican chemist Luis E. Miramontes synthesizes the first oral contraceptive
1997 - The Cassini probe launches from Cape Canaveral on its way to Saturn.
2001 - NASA’s Galileo spacecraft passes within 112 miles of Jupiter’s moon Io.
Births
1608 - Evangelista Torricelli, Italian…