Universal Regeneration: Is Expansion Recycled?

[alexkerhead]

Is it possible that maybe the universe always expands in the same phsical place every time it expands, after collapse?
Or is the only viable theory that the universe floats through empty space?
I know this is a dumb question, but please, any insight is useful.

 

[SpaceTiger]

Is it possible that maybe the universe always expands in the same phsical place every time it expands, after collapse?
Or is the only viable theory that the universe floats through empty space?
I know this is a dumb question, but please, any insight is useful.

The universe just is, we don't usually embed it in a higher dimensional space. The empty space around us is part of the universe.

 

[Pippo]

The universe just is, we don't usually embed it in a higher dimensional space. The empty space around us is part of the universe.

Do you mean with empty space a free space that can be occupied or do you mean: empty space = nothing ?
tks

 

[SpaceTiger]

Do you mean with empty space a free space that can be occupied or do you mean: empty space = nothing ?

I mean the vacuum, which, in QFT, is most certainly something.

 

[Pippo]

I mean the vacuum, which, in QFT, is most certainly something.

As the universe is not infinite what is there after the "something"?

 

[russ_watters]

There doesn't need to be anything else out there - not even some "emptiness" - for the universe to be finite. It doesn't need a boundary. Consider the surface of a sphere: it has no boundaries, yet is finite.