It was just a matter of propulsion. Find a way to increase energy and you keep breaking speed records. That was the key to the Boscon Prop.
Ironically, Boscon's basic principles dated back to the invention of the wheel. In watching a simple spinning disk, Boscon understood that the number of rotations was the constant while the speed upon the same surface was variable. He applied this reasoning for matter spinning about the nucleus of an atom.
He theorized that if it were possible to expand an electron's orbit around the nucleus without searing it off, the speed at the outer edge would exceed the speed near the center; the speed of light would be surpassed. With a few adaptations, like making the fuel more efficient, and concentrating the density of the charge, interstellar travel became as common as solar system