If Space is a vacuum with nothing in it, then what would the edge of the universe even mean

Question

…it would be a ‘border’ between nothing and nothing?

In: Planetary Science

Answer 1

Vacuum has nothing in it but vacuum itself is not nothing. Space is also not nothing, the nothing in the context of what is beyond the universe means there is no space/time as we knows. Is it truly nothing? Who knows, but it doesn’t have space and time, so our entire understanding doesn’t work at all there as every physics law we derived has based on space and time. We literally cannot explain “what is beyond/outside space/time” because the concept is invalid in the first place. The idea of inside/outside before/after is created based on space/time, you cannot say “before time” or “outside of space” , because that concept does not make sense. It’s like asking “what do you see with your elbow?” The question itself is not valid for us, but for some species with eyes in their elbow, it is very natural question to them.