And it's rotating and moving at speeds we can only imagine. I got in an argument about whether the sun moves or not. Non science folks of course .... Did you ever hear the theory about space being one big bubble? It's really fascinating, I can't explain it, but if you've heard the theory, you'd know what I'm trying to get at. It's like a huge orb, and if you go far enough out, billions and billions of light years, you'll end up at your starting point. It's fun to contemplate this stuff.
If that's true then light from the Galaxies is doing the same thing and there isn't as many galaxies as we think. Instead of seeing billions of galaxies we are just seeing the same few galaxies over and over again. Remember galaxies are moving so by the time their light got back to it's starting point they are long gone. If the universe has been around a long time then the light would have "Looped around" many times. So instead of seeing billions of "Real" galaxies we are instead actually just seeing billions of "Echos".