[odawg]

I have always asked, what exactly is the universe expanding into? If you approach the very edge of the universe, and look across, what would you see? I asked a professor that once, and he snickered.

[BitWielder1]

I have always asked, what exactly is the universe expanding into? ...

The idea is that the space is created as the universe expands.
There was literally nothing there before.
We humans have a hard time picturing that. Our minds insist there must be some kind of empty void out there already, but where would *that* have come from?