It’s hard for me to comprehend the idea that space never ends. Is there really no boundary to space? How do scientists know this?

Question

It’s hard for me to comprehend the idea that space never ends. Is there really no boundary to space? How do scientists know this?

In: Planetary Science

Answer 1

To have a boundary would mean a wall needs to exist since empty space is already empty.

So for such a ridiculously huge wall to exist is even harder to comprehend.

If the boundary of space is supposed to just have nothing, then that is just empty space since an empty space is nothing so no boundary is reached either.