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PostPosted: Thu Apr 15, 2010 10:27 am 
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Intriguing idea. Makes you wonder...

http://newsinfo.iu.edu wrote:
Our universe at home within a larger universe? So suggests IU theoretical physicist's wormhole research

BLOOMINGTON, Ind. -- Could our universe be located within the interior of a wormhole which itself is part of a black hole that lies within a much larger universe?

Such a scenario in which the universe is born from inside a wormhole (also called an Einstein-Rosen Bridge) is suggested in a paper from Indiana University theoretical physicist Nikodem Poplawski in Physics Letters B. The final version of the paper was available online March 29 and will be published in the journal edition April 12.

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IU theoretical physicist Nikodem Poplawski in research published in "Physics Letters B" uses Euclidean-based mathematical modeling to suggest that all black holes may have wormholes inside which exist universes created at the same time as the black holes.

Poplawski takes advantage of the Euclidean-based coordinate system called isotropic coordinates to describe the gravitational field of a black hole and to model the radial geodesic motion of a massive particle into a black hole.

In studying the radial motion through the event horizon (a black hole's boundary) of two different types of black holes -- Schwarzschild and Einstein-Rosen, both of which are mathematically legitimate solutions of general relativity -- Poplawski admits that only experiment or observation can reveal the motion of a particle falling into an actual black hole. But he also notes that since observers can only see the outside of the black hole, the interior cannot be observed unless an observer enters or resides within.

"This condition would be satisfied if our universe were the interior of a black hole existing in a bigger universe," he said. "Because Einstein's general theory of relativity does not choose a time orientation, if a black hole can form from the gravitational collapse of matter through an event horizon in the future then the reverse process is also possible. Such a process would describe an exploding white hole: matter emerging from an event horizon in the past, like the expanding universe."

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Einstein-Rosen bridges like the one visualized above have never been observed in nature, but they provide theoretical physicists and cosmologists with solutions in general relativity by combining models of black holes and white holes.

A white hole is connected to a black hole by an Einstein-Rosen bridge (wormhole) and is hypothetically the time reversal of a black hole. Poplawski's paper suggests that all astrophysical black holes, not just Schwarzschild and Einstein-Rosen black holes, may have Einstein-Rosen bridges, each with a new universe inside that formed simultaneously with the black hole.

"From that it follows that our universe could have itself formed from inside a black hole existing inside another universe," he said.

By continuing to study the gravitational collapse of a sphere of dust in isotropic coordinates, and by applying the current research to other types of black holes, views where the universe is born from the interior of an Einstein-Rosen black hole could avoid problems seen by scientists with the Big Bang theory and the black hole information loss problem which claims all information about matter is lost as it goes over the event horizon (in turn defying the laws of quantum physics).

This model in isotropic coordinates of the universe as a black hole could explain the origin of cosmic inflation, Poplawski theorizes.

Poplawski is a research associate in the IU Department of Physics. He holds an M.S. and a Ph.D. in physics from Indiana University and a M.S. in astronomy from the University of Warsaw, Poland.

To speak with Poplawski, please contact Steve Chaplin, University Communications, at 812-856-1896 or stjchap@indiana.edu.

"Radial motion into an Einstein-Rosen bridge," Physics Letters B, by Nikodem J. Poplawski. (Volume 687, Issues 2-3, 12 April 2010, Pages 110-113.

Source: http://newsinfo.iu.edu/news/page/normal/13995.html

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PostPosted: Thu Apr 15, 2010 11:43 am 
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I've heard stranger theories on how the universe began..

Stuff like this is simultaneously silly, exciting, and scary. Silly because it just sounds weird, exciting because what if we really knew where we were, and scary because what would people do with that kind of knowledge.

Sooner or later someone is going to discover how the universe was created, they're working on it now with that Large Hadron Collider. Maybe a treaty was signed to stop advancing nuclear bomb technology cuz they now have the black hole gun ready to go, you just take aim and the target implodes onto a pinhead.

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PostPosted: Thu Apr 15, 2010 1:06 pm 
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I don't think they're going to get anywhere with that collider aside from waste energy. The entire premise is flawed in that they think they can recreate the conditions through which the theoretical Big Bang occurred with an amount of energy in comparison so tiny that it wouldn't even be enough to blow this measly planet apart, much less cause the sun to go nova.

On the issue of black holes caused by this thing...baseless fears. Any black holes formed won't have enough mass to sustain themselves, and as such, not enough gravity to pull anything else onto them. It doesn't matter how dense they are if they don't have enough mass to have a strong gravitational pull to draw in anything else. The only way to do this is to forcibly manipulate and harness gravity itself, which isn't something one can do without high level dimensional technologies, and if scientists keep building upon false premises and bad math to not be able to figure out the number and scope of dimensional levels, that's not going to happen anytime soon.

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