If space is a vacuum and not a fabric made out of a material how do wormholes work? (Please avoid the pen through paper analogy)

Question

I’m struggling to understand how someone can create a hole in space if space is already a vacuum. I mean, you can’t create a hole in emptiness. So where does that leave wormholes?

In: 0

Answer 1

It’s a hole in the space itself, not in something *in* space. The very “go into that direction” gets warped. If you select a set of coordinate axes and then go one mile forward, one mile left, one mile back and one mile right in normal “flat” space, you will arrive at your starting point. In warped space your coordinates are screwed and you will end up somewhere else. A hole in space is just a special case of warp.