ヘルマン・オーベルト
Robert Albert Charles Esnault-Pelterie (November 8, 1881 – December 6, 1957) was a French aircraft designer and spaceflight theorist. He is referred to as being one of the founders of modern rocketry and astronautics, along with the Russian Konstantin Tsiolkovsky, the German Hermann Oberth, and the American Robert H. Goddard.