Click the titles to the left to
understand that the invention of gravity propelled interplanetary space
travel represented a radically new theory of space travel completely
different from the classical theory based on reaction propulsion as
described by Newton's Third Law of Motion. Gravity propelled space
travel represented a mathematical method of space travel made possible by
finding a numerical solution of the famous "Restricted Three Body Problem"
of celestial mechanics and applying the solution serially to achieve a
free-fall trajectory that is accelerated through the solar system by
passing a series of planets without using any rocket propulsion.
