October 14, 2010
Old Universe Shrank To Create Ours?

Our universe came from a big bounce rather than a big bang?

Enter loop quantum gravity, devised by Abhay Ashtekar of Pennsylvannia State University (PSU) in University Park and colleagues to reconcile general relativity with quantum mechanics. When Ashtekar's team created cosmological models inspired by LQG in 2006, these suggested the universe emerged from the remnants of an earlier universe that was crunched down to a tiny volume by gravity, not from the big bang (see diagram).

If that's the eventual fate of our own universe then what of all the events happening to us? "All those moments will be lost in time, like tears in rain."

Share |      Randall Parker, 2010 October 14 11:55 PM  Space Multiverse


Comments
MCrab said at October 15, 2010 12:43 AM:
If that's the eventual fate of our own universe then what of all the events happening to us?

They'll be repeated in future universes. We will all live our lives again and indeed every possible life. Who needs God?

PacRim Jim said at October 15, 2010 10:56 AM:

I think we all know what will happen to us:
A crested renroggle on Silox 4 will awaken and we--as well as everyone and everything we know--will vanish as it awakens from a bad drang-dream.

Paul said at October 17, 2010 7:58 AM:

The problem with cyclic universe schemes is the second law of thermodynamics. Entropy increases during the evolution of a universe, and doesn't get reset at a bounce.

Engineer-Poet said at October 17, 2010 3:27 PM:

That assumes that the physical laws underlying entropy continue to hold through the re-unification of forces and such in a Big Crunch.

Lono said at October 20, 2010 10:09 AM:

Doesn't this go against the current evidence which shows us going towards a "big rip" due to increasing acceleration of the Universe over time.

Otherwise the bounce theory - in one form or another - would just be the inevitable result of gravity.


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