Where Did the Big Bang Happen? Where's the center of the Universe?

This is actually a pretty common question; however, the term "the center of the universe" doesn't really mean anything. In short, this is because of relativity--it makes it so that we can define any point that we want as the center of the universe. It makes absolutely no difference. This is because we don't have what you might call "an impartial reference frame," so if we need to make a grid or graph (something that, by its nature, has to have a center) we can put the center wherever we want to and it does not change our results.

To read the full article, see: http://www.fromquarkstoquasars.com/where-did-the-big-bang-happen-wheres-the-center-of-the-universe/