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Author Topic:   Possible evidence for cyclical universe.
ramoss
Member (Idle past 612 days)
Posts: 3228
Joined: 08-11-2004


Message 1 of 1 (593735)
11-29-2010 12:12 AM


While I think the information is still vague, and the confirmation is a while off (if not falsified), it is pretty interesting
http://www.sciencenews.org/.../id/66525/title/Cosmic_rebirth
Cosmic rebirth
Circular patterns in the universe's pervasive background radiation suggest the Big Bang was only the latest of many
Most cosmologists trace the birth of the universe to the Big Bang 13.7 billion years ago. But a new analysis of the relic radiation generated by that explosive event suggests the universe got its start eons earlier and has cycled through myriad episodes of birth and death, with the Big Bang merely the most recent in a series of starting guns.
That startling notion, proposed by theoretical physicist Roger Penrose of the University of Oxford in England and Vahe Gurzadyan of the Yerevan Physics Institute and Yerevan State University in Armenia, goes against the standard theory of cosmology known as inflation.
The researchers base their findings on circular patterns they discovered in the cosmic microwave background, the ubiquitous microwave glow left over from the Big Bang. The circular features indicate that the cosmos itself circles through epochs of endings and beginnings, Penrose and Gurzadyan assert. The researchers describe their controversial findings in an article posted at arXiv.org on November 17.
The circular features are regions where tiny temperature variations in the otherwise uniform microwave background are smaller than average. Those features, Penrose said, cannot be explained by the highly successful inflation theory, which posits that the infant cosmos underwent an enormous growth spurt, ballooning from something on the scale of an atom to the size of a grapefruit during the universe’s first tiny fraction of a second. Inflation would erase such patterns.
The existence of large-scale coherent features in the microwave background of this form would appear to contradict the inflationary model and would be a very distinctive
signature of Penrose's model of a cyclic universe, comments cosmologist David Spergel of Princeton University. But, he adds, The paper does not provide enough detail about the analysis to assess the reality of these circles.
Penrose interprets the circles as providing a look back, past the glass wall of the most recent Big Bang, into the universe’s previous episode, or aeon, as he calls it. The circles, he suggests, were generated by collisions between supermassive black holes that occurred during this earlier aeon. The colliding black holes would have created a cacophony of gravitational waves ripples in spacetime due to the acceleration of the giant masses. Those waves would have been spherical and uniformly distributed.
More at the link.. including criticisms of it.

  
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