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

My personal opinion, based on Alan Guth’s theory of eternal inflation, is that if you could travel infinity fast through the universe, you would eventually reach a place where the conditions of the Big Bang are still happening.

That being, the Big Bang wasn’t a one-time event. Rather, it is a *continuous* event. The Big Bang is like a wave, that travels at the boundary of the universe, creating more and more universe as it goes. It will continue forever.

This means the universe is both flat and finite, which is consistent with observations, and will grow eternally.