So I’ve been going through the dangerous rabbit hole of wondering how everything came to be and, obviously, the leading theory is the big bang theory. Where an infinitely dense spot of matter exploded and created every single thing in existence, including the ever-expanding universe. So, if the ever-expanding universe started expanding from an infinitely dense spot that exploded, wouldn’t that spot be the “center of the universe”, since it’s the starting point of said expansion?
Where is the centre of the world map?
Doesn’t make sense to ask that. It’s entirely arbitrary which county is used as the centre of the map.
If the earth itself expanded then all of our lands and the ocean would expand, but there still wouldn’t be some centre point on our map.
> So, if the ever-expanding universe started expanding from an infinitely dense spot that exploded, wouldn’t that spot be the “center of the universe”, since it’s the starting point of said expansion?
Well, yes. But that point is now everywhere. Every point is “birthed” from this one*.
Due to how expansion and relativity presents itself, every point will give the expression to be the center: stuff moves away in all directions. The answer can both be “there is no center” and “everything is a center”. Whichever you prefer.
*: the actual model is different and there quite possibly might have never been a “point”.
There is no centre. Everywhere in the universe has the same claim to the original spot of the big bang because it is space itself that was created. The universe isn’t expanding into anything so there isn’t an ‘edge’ that is further away from the ‘middle’.
Earth is the centre of the observable universe, but there is no single point which everything expands away from.
The big bang didn’t happen at a single spot. The big bang wasn’t an explosion within the universe, it was a rapid expansion of everything, everywhere (all at once).
Everything was infinitely dense, then space itself expanded and things became less dense. There was no centre because it happened everywhere.
It’s not impossible that the universe has a centre somehow, but our theories so far make more sense if we assume the universe is infinite, and an infinite universe doesn’t have a centre