Author Topic: No evidence of time before Big Bang  (Read 545 times)

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Offline Jetavan

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No evidence of time before Big Bang
« on: December 10, 2010, 02:55:18 PM »
(Another possibly misleading headline)

Latest research deflates the idea that the Universe cycles for eternity

Gurzadyan and Penrose argue that collisions between supermassive black holes from before the Big Bang would generate spherically propagating gravitational waves that would, in turn, leave characteristic circles within the cosmic microwave background.

Most cosmologists believe that the Universe, and with it space and time, exploded into being some 13.7 billion years ago at the Big Bang, and that it has been expanding ever since. A crucial component of the standard cosmological model — needed to explain why the Universe is so uniform — is the idea that a fraction of a second after the Big Bang, the Universe underwent a brief period of extremely rapid expansion known as inflation.

Penrose, however, thinks that the Universe's great uniformity instead originates from before the Big Bang, from the tail end of a previous aeon that saw the Universe expand to become infinitely large and very smooth. That aeon in turn was born in a Big Bang that emerged from the end of a still earlier aeon, and so on, creating a potentially infinite cycle with no beginning and no end.
....
Now Gurzadyan and Penrose's idea is being challenged by three independent studies, all posted on the arXiv server within the past few days....

All three groups reproduced Gurzadyan's analysis of the WMAP data and all agree that the data do contain low-variance circles. Where they part company with the earlier work is in the significance that they attribute to these circles.

(Gurzadyan's response.)
_____________

Things are getting curiouser and curiouser.
« Last Edit: December 10, 2010, 03:00:49 PM by Jetavan »
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Offline Papist

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Re: No evidence of time before Big Bang
« Reply #1 on: December 10, 2010, 04:49:10 PM »
So no time before time?
You are right. I apologize for having sacked Constantinople. I really need to stop doing that.

Offline Jetavan

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Re: No evidence of time before Big Bang
« Reply #2 on: December 10, 2010, 05:44:54 PM »
So no time before time?
The Big Bang would not constitute the absolute beginning of time-and-space.
« Last Edit: December 10, 2010, 05:46:26 PM by Jetavan »
If you will, you can become all flame.
Extra caritatem nulla salus.
In order to become whole, take the "I" out of "holiness".
सर्वभूतहित
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"Those who say religion has nothing to do with politics do not know what religion is." -- Mohandas Gandhi
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Offline David 2007

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Re: No evidence of time before Big Bang
« Reply #3 on: December 10, 2010, 07:15:03 PM »
I thought it's more accurate to call this theory The Big Bounce?

Perpetual imploding and exploding universe?



Offline Jetavan

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Re: No evidence of time before Big Bang
« Reply #4 on: December 10, 2010, 07:21:09 PM »
I thought it's more accurate to call this theory The Big Bounce?

Perpetual imploding and exploding universe?
I think Penrose is suggesting something slightly different: instead of the universe actually contracting in upon itself, the universe simply keeps expanding, and at some point, a new "big bang" occurs within that expanded universe, somehow creating a new universe.
If you will, you can become all flame.
Extra caritatem nulla salus.
In order to become whole, take the "I" out of "holiness".
सर्वभूतहित
Ἄνω σχῶμεν τὰς καρδίας
"Those who say religion has nothing to do with politics do not know what religion is." -- Mohandas Gandhi
Y dduw bo'r diolch.