Hermann Oberth (1894 - 1989) was known as the Father of Astronautics. Born in Rumania in 1894, he received his German citizenship in 1941. After extensive studying at Gottingen, Heidelberg, Klausenbury, Munich and Vienna, he became a teacher, having at one time Dr. Wernher von Braun as his pupil. In 1923 he published his first work, The Rocket to the Planets, the first book to treat the theory of rockets as applicable to space flight in a scientific manner. Oberth was one of the three great rocket pioneers of the world, along with Professor Goddard of America and Professor Ziolkovsky of Russia.