Where does it end and why? I think the same can be said for going down instead of out. You look down and there is atoms, then electrons, protons, and neutrons, to quantum mechanics, to string theory... As far as we know it doesn't end, and as for man I don't see us ever discovering an end.

I believe the other point you are trying to make, after looking at the websites,is that the stars in our milky way don't have the same orbital dynamics as the galaxies do. I wouldn't think they would. Even the stars in other galaxies don't have the same orbital pattern.