Hermann Oberth, Romanian-German physicist and engineer (d. 1989)
Hermann Julius Oberth (German: [ˈhɛrman ˈjuːli̯ʊs ˈoːbɛrt]; 25 June 1894 – 28 December 1989) was an Austro-Hungarian-born German physicist and engineer. He is considered one of the founding fathers of rocketry and astronautics, along with the French Robert Esnault-Pelterie, the Russian Konstantin Tsiolkovsky, the American Robert Goddard and the Austro - Hungarian born Slovenian Herman Potočnik - Hermann Noordung.