Hermann Oberth

Hermann Julius Oberth (; 25 June 1894 – 28 December 1989) was an Austro-Hungarian-born German physicist and rocket pioneer of Transylvanian Saxon descent. He is considered one of the founding fathers of rocketry and astronautics, along with Robert Esnault-Pelterie, Konstantin Tsiolkovsky, Robert H. Goddard and Herman Potočnik (also known under the pseudonym Hermann Noordung). Oberth supported Nazi Germany's war effort and received the War Merit Cross (1st Class) in 1943.'''' Provided by Wikipedia