It is my conclusion that UFOs do exist, are very real, and are spaceships from another or more than one solar system. They are possibly manned by intelligent observers who are members of a race carrying out long-range scientific investigations of our earth for centuries.
Hermann OberthThe rockets... can be built so powerfully that they could be capable of carrying a man aloft.
Hermann OberthDespite the immense distance between our own solar system (including the earth) and the nearest other solar systems, a journey from one system to another is theoretically possible, once an unlimited source of power is developed.
Hermann OberthThis is the goal: To make available for life every place where life is possible. To make inhabitable all worlds as yet uninhabitable, and all life purposeful.
Hermann Oberth