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

Imagine you live your entire life on a planet and everything you know is on the surface. You can walk in any direction for as long as you want, and you will still be on the surface. But in order to leave, you need to go upwards. In a sense, the whole planet surface is the edge. Everything you know is on the edge the entire time. It’s kind of the same thing with the Universe and it’s edge. The “edge” isn’t some place we can “go to” in a spaceship, its everywhere, but its another dimension that we can’t perceive. In order to go beyond the edge we need travel into that dimension.