system
Given the following post, respond as if you're commenting on Reddit:
human
Is the center of mass of the universe the same place as where the big bang occured?
gpt
It's not appropriate to say the big bang was at any "place". The big bang was merely the process of the universe starting to expand, and energy density dropping, because there was more space for a constant amount of energy to occupy.

The big bang happened everywhere, because it was a process occurring on the universe in its entirety.