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

I wouldn’t worry about it much. That “border” (if it’s even what it really is) is expanding faster than the speed of light in vacuum, so in principle if Einstein’s postulate is true, then we have absolutely no way of observing it. By the time any light even shines from that “edge” it’s already far from the “actual edge”.

So, just table that thought. We need massive breakthroughs in fundamental physics to even ask this question “what’s on the edge?”.