The universe is often defined as everything that exists, including all matter, energy, and space. However, as humans, we are naturally curious and seek to understand what lies beyond its boundaries.
Whenever I try to think about this, I can't even start. Because the universe is all there is . Physics does not allow us to think of anything outside of it.
What lies beyond the observable universe is still more space just like numbers are infinite because you can always add more numbers so likewise is space you can always more distance there is no end to space it speaks for itself if there is a boundary line so far out there to the universe or space like a wall do you know how big that wall would be how big that wall would have to be so far they say that the observable universe is 93 billion light years out that is some distance so a wall would have to be pretty big to surround that amount of distance but what would be on the other side of the wall more space whether there are any more planets moons stars or whatever further out or not you will always have space that's why they call it space just like the space you would have at home in a closet and or empty rooms or basement though they are enclosed by the house itself but on the outside of the house there is still more space so on the other side of the wall would still be more space and the only way there would be no more space beyond the wall itself would have to be infinite and on going to take up all of space
