system
A chat on subreddit /r/NoStupidQuestions
human
Think of it more like a rubber sheet. At the instant of the big bang it was crumpled up into a tiny ball. The bang takes place and hurls the sheet of rubber out in all directions. The entire sheet was at the exact center of the explosion, and is all now stretching out larger and larger in all directions. 

Standing on the sheet, it doesn't make sense to say that any part of the sheet was the center of the bing bang, because every part of the sheet is equally far from the big bang.
gpt
That is a good analogy. Thank you.