That's true, but then again, it's not known if there truly is a sphere of mass there...if there is anything there, for that matter. Quite simply, physics (both Newtonian and Quantum) can not explain it, so quite simply people can speculate and make educated guesses, but they're regardless only theories, nothing more. If you've ever seen the 1998 anime series COWBOY BEBOP, they too incorporate jumpgates and what-not, but to a far lesser degree, only using them to travel within our Solar System and only as far as the moons of Jupiter, specifically Ganymede and Callisto. They also refer to the "Gate Accident" where sometime before 2081, apparently, they were testing a jumpgate on the Moon when it exploded and sent enormous chunks of our rocky satellite raining down on Earth. The subsequent Deep Impact scenario it caused forced humanity to really push immigration (which had already begun at least twenty years earlier) into space, so that people live on Mars, Ganymede, and Callisto (with an attempt to terraform Titan, but it failed and two subsequent wars were fought there). EDIT: That's interesting, the post submitted itself before I finished typing and hit the 'Submit' button, yet I remained on the same screen....