Big bounce theory in light of the closed Universe finding

[user30]

TL;DR

The Big Bounce theory has seen a resurgence in light of the Plank evidence of a closed universe. Which type of cyclic universe would it most likely point to?

As you all know:

Planck evidence for a closed Universe and a possible crisis for cosmology

https://www.nature.com/articles/s41550-019-0906-9

If confirmed, it would bring back the Big Bounce as a possible hypothesis for the evolution of the universe. This has long-term consequences being that the Big Bounce results in cyclic Big Bangs, since the expansion of the universe is not permanently accelerating, as once thought.

What I'm curious about is, which model would best fit the model - eternal return or differentiated Bing Bangs? That is to say same histories or different?

Here is some overview of the Big Bounce hypothesis.
https://en.wikipedia.org/wiki/Big_Bounce

 

[user30]

I'll add: This is from a threadmaker who has been speaking of the Big Bounce and the cyclic universe in opposition to the status quo and accelerating universe, not at all convinced our data is all that meets the eye. As you all can imagine, I am more than excited by these findings.

Let's see if it sticks, too...

 

[mathman]

It's all guesswork at this time. There doesn't seem to be any observational evidence to distinguish theories.

 

[user30]

It's all guesswork at this time. There doesn't seem to be any observational evidence to distinguish theories.

Then the field is dead by your estimation. Science withour falsification is pretty meaningless.

 

[user30]

FWIW

"Alternative pictures including a Big Bounce may provide a predictive and falsifiable possible solution to the horizon problem, and are under active investigation as of 2017.[1]"

 

[PeterDonis]

are under active investigation

Yes. But it is too early to tell how all this will turn out. The Planck evidence itself is still being reviewed and might turn out not to imply what some are saying it implies.

In short, this area is in too much flux right now for us to say anything definitive. Thread closed.