But "stretching" is more accurate of a word than "expanding" Expanding implies adding more to it - like air to a baloon.

I think a good way to describe it is:

- You have a ruler that goes from minus infinity to infinity with a mark every 1"

- The marks are all moving further apart from each other

The ruler is not expanding into anything, the marks on the ruler are just expanding on the ruler into infinity.

And I believe that is a young Ted Nugent on guitar.