I'm sure this is probably a stupid question with an obvious answer.. But i can't come up with it.. So, the observable universe is ment to be 90 billion lightyears across, right? And it's 13.8 billion years old, right? And a lightyear is the distance it takes for light and fields and stuff to reach us in a year, right? So the light and stuff from the things of 13.8 billion lightyears away should be 13.8 billion lightyears old, and as it was at the bang in all directions around us...right..? How could we see further than that?