When I think of what happened in the big bang theory and in today's world when we look through telescopes and look at distant objects it raises the question of how far back in time can we actually see with more and more powerful telescopes? One thing that I find confusing is that at the time of the big bang I assume many things were expanding at or close to the speed of light and then slowed down as they changed to particles with more mass. In which case, everything on the boundary of expansion would have its 'history' moving at the same speed as everything else. How is it possible to see light that has already passed us and is heading outwards from the centre of expansion? Sure we can see distant stars and we see them as they were 100 or so light years away.....but the light that was present when the universe was close would surely have passed the earth with nothing to reflect it back..... is this right? If this is true then the light or information that we can view that shows the very early universe is way passed the earth with nothing in the beyond that is able to reflect it back.