Term for space in front of the expanding universe.

[Federico777]

Is ther a term for the space that the expanding universe has not reached yet. Is it called a void or is it some other term. Also if you could link some articles about this space the universe hasnt reached yet I would love to read about it. Thank you all.

 

[marcus]

No. there is no term for that. Classically the universe contains all space, there is no "outside"

A better way to think of "expanding" is from the inside, things getting farther apart without going anywhere.
Can be confusing to think of it from the outside.