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 BabiÅski, Polish-French neurologist
1933 - Albert Calmette, French physician
1971 - Arne Tiselius, Swedish chemist and Nobel Prize laureate