system
Given the following post, respond as if you're commenting on Reddit:
human
Since the Big Bang certainly influenced every event in the universe, does this mean that the origin of the Big Bang is in the past light cone of every point in the universe?

But isn't this also impossible, since the universe is more light-years across than years there have been *since* the Big Bang? Is there a concept that rectifies this?
gpt
First off, dismiss the idea of the Big Bang as an explosion whose ejecta have been traveling outward. That is not the Big Bang.

The Big Bang is simply the event when all of space began stretching. The universe is very probably either infinite or finite-but-unbounded (a geometry analogous to the surface of a sphere, in which traveling far enough in one direction results in returning to your start point), and the Big Bang happened everywhere at once. So yes, the Big Bang is in the past light cone of every point everywhere in the universe, because it happened everywhere.