Hermann Julius Oberth (1894-1989) is regarded with Robert Goddard as one of the 'fathers' of modern astronautics. Oberth simulated weightlesnes and designed a long-range liquid-propelled rocket. He published 'The Rocket into Interplanetary Space', which allowed him to correspond with Robert Goddard and Konstantin Tsiolkovsky, and later wrote 'The Road to Space Travel'. In 1941 he became asistant to the German rocket engineer Werner von Braun, and later worked in Italy to develop solid-propellant and anti-aircraft rockets for the Italian Navy, and advanced rocket research for the US army.
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