Theodor von Oppolzer
Theodor von Oppolzer (26 October 1841 – 26 December 1886) was an Austrian astronomer and mathematician of Bohemian origin. The son of the physician Johann Ritter von Oppolzer, Theodor was born in Prague. He completed his graduate studies in medicine at the University of Vienna, gaining a Ph.D. in 1865. He also owned a private observatory. He began teaching theoretical astronomy and geodesics at the University of Vienna in 1866.