Astronomers can’t agree on how fast the universe is expanding. New approaches are aiming to break the impasse:
https://theconversation.com/astronomers-cant-agree-on-how-fast-the-universe-is-expanding-new-approaches-are-aiming-to-break-the-impasse-236985
So what is the universe expanding in to ? I get the idea of inflation so in effect the universe is like a bubble expanding, is the force creating this caused by the energy from the big bang or is the space the universe is expanding in to providing the force to sort of drag this bubble out further ?
I think there are 3 ideas on how it will end, one is it just carries on forever, the 2nd is that it will eventually rip apart, third is it will collapse back in on itself and a sort of 4th is that after it collaposes it undergoes inflation in a 'cyclic universe model. I am sure since I did this at OU these ideas may have been refined and expanded a little.
