March 4th
1675 - John Flamsteed appointed first Astronomer Royal of England.
1774 - First sighting of Orion Nebula by William Herschel.
1822 - Birth of Jules Antoine Lissajous, French mathematician
1835 - Birth of John Hughlings Jackson, English neurologist
1847 - Birth of Karl Bayer, Austrian chemist
1853 - Death of Christian Leopold von Buch, German geologist
1854 - Birth of Napier Shaw, British meteorologist
1859 - Birth of Alexander Stepanovich Popov, Russian physicist
1862 - Birth of Jacob Robert Emden, Swiss astrophysicist and meteorologist
1871 - Birth of Boris Galerkin, Russian mathematician
1877 - Emile Berliner invents the microphone
1881 - Birth of Richard C. Tolman, American mathematical physicist
1882 - Britain's first electric trams run.
1889 - Birth of Oscar Chisini, Italian mathematician
1903 - Birth of William C. Boyd, American immunochemist
1904 - Birth of George Gamow, Ukrainian-born physicist
1910 - Death of Knut Ångström, Swedish physicist
1914 - Birth of Robert R. Wilson, American physicist, sculptor and architect
1916 - Birth of Hans Eysenck, German-born psychologist
1923 - Birth of Sir Patrick Moore, British astronomer
1927 - Death of Ira Remsen American chemist
1934 - Birth of Janez Strnad, Slovenian physicist
1952 - Death of Charles Scott Sherrington, English scientist, Nobel laureate
1967 - Death of Michel Plancherel, Swiss mathematician
1973 - Death of Samuel Tolansky, British scientist and expert on spectroscopy
1976 - Death of Walter H. Schottky, German physicist
1977 - The first Cray-1 supercomputer is shipped to the Los Alamos National Laboratory,
1979 - Voyager I photo reveals Jupiter's rings.
1997 - Death of Robert H. Dicke, American physicist
2004 - Death of George Pake, American physicist
2006 - Final contact attempt with Pioneer 10 by the Deep Space Network. No response is received.