Hermann Oberth: If there is a small rocket on top of a big one, and if the big one is jettisoned and the small one is ignited, then their speeds are added.

If there is a small rocket on top of a big one, and if the big one is jettisoned and the small one is ignited, then their speeds are added.


		Name: Hermann Oberth Type: Scientist Nationality: German Birth: June 25, 1894 Death: December 28, 1989

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