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Events
1991 – The American Galileo spacecraft makes its closest approach to 951 Gaspra (above), becoming the first probe to visit an asteroid.
Births
1656 (O.S.) – Edmond Halley, English astronomer
1827 – Marcellin Berthelot, French chemist
1880 – Abram Ioffe, Soviet physicist
1915 – William Berenberg, American physician
1920 – Baruj Benacerraf, Venezuelan-born immunologist and Nobel Prize laureate
1923 – Carl Djerassi, Austrian chemist
Deaths
1932 – Joseph Babiński, Polish-French neurologist
1933 – Albert Calmette, French physician
1971 – Arne Tiselius, Swedish chemist and Nobel Prize laureate