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Hermann Julius Oberth, born June 25, 1894 in Hermannstadt, is, along with the Russian Konstantin Tsiolkovsky and the American Robert Goddard, one of the three founding fathers of rocketry and modern astronautics.
In 1912 Hermann Oberth enrolled in the University of Munich to study medicine. His scholarly pursuits, however, were interrupted by the First World War.
In 1922 Oberth’s doctoral thesis on rocketry was rejected.
In 1923, the year after the rejection of his dissertation, he published the 92 page Die Rakete zu den Planetenraumen (The Rocket into Planetary Space). This was followed by a longer version (429 pages) in 1929, which was internationally celebrated as a work of tremendous scientific importance.
In the thirties Oberth took on a young assistant who would later become one of the leading scientists in rocketry research for the German and then the United States governments; his name was Werhner von Braun. They worked together again during the Second World War, developing the V2 rocket
In 1923 he wrote in the final chapter of Die Rakete zu den Planetenraumen (The Rocket into Planetary Space)
In 1923, then, he became the first to prove that rockets could put a man into space
Hermann Julius Oberth died in a Nuremberg hospital in West Germany on December 29, 1989 at the age of 95.