I admit I am unaware of any method of determining the center of the galaxy without actually seeing it. I would be grateful if you could turn me on to that. You could perhaps use Kepler's orbital laws but that would take an extremely long time. The sun takes 240 million years to go around once. The galaxies would take much longer. My theory can be disproved very readily by the new telescopes soon to be coming on line. If there is nothing out there past 13.7 billion light years (NASA WMAP number) I will post my sincere apology for being a crackpot.