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

Technically speaking there is no area of the universe where there is “nothing”. It can lack atoms, but the quantum fields still exist, dark energy exists, space time still exists etc. There is no situation where there is no space time and no quantum fields etc. that we know of. Although it is impossible to prove, most physicists believe the universe is infinite so there would be no edge.