Another large scale structure of the universe idea


by Tanelorn
Tags: scale, structure, universe
Tanelorn
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#1
Oct20-10, 06:22 PM
P: 695
Has the following explanation for the large scale structure of the universe been considered and discounted?


Consider a universe many billions of times the size of the observable universe, so big that the homogeneous nature of the universe could even be an illusion.

At a very large distance away, it may be possible that the events of the "big bang" could be still taking place, resulting in a universe which is continually being renewed, with matter and energy there undergoing continuous inflation.

This continual inflation energy would force the observable universe to move away rapidly, and also if the observable universe is relatively small, the expansion away from us might appear similar in all directions, as we mostly observe.

If this scenario has been going on for some time, there may even be gravitational acceleration towards a large amount of matter that is already out there.

Can the above explanation be discounted with information that we already have?
The recent paper on dark flow paper seems related to this. Kashlinsky et al. 2010. ApJL, 712, L81



On a separate note, some have wondered about an edge to our universe. If black holes are no longer a part of our universe, then perhaps the "edges" to our universe are in fact everywhere. Exit right from the pinball universe!



Just throwing it out there.. Until we get more information there are probably any number of possible explanations that appear to fit, but very fascinating nonetheless.
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Tanelorn
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#2
Oct22-10, 08:39 AM
P: 695
Is the dark energy expansion of space and inflation a continuation of the same process?

http://arstechnica.com/science/news/...-inflation.ars


Size of the universe:

The comoving distance from Earth to the edge of the observable universe is about 14 billion parsecs (46.5 billion light-years) in any direction. The visible universe is thus a sphere with a diameter of about 28 billion parsecs (about 93 billion light-years).

According to the theory of cosmic inflation and its founder, Alan Guth, it is suggest that at present the entire Universe's size is at least 10 to power 23 times larger than the size of the observable Universe. Guth realized from his theory that the reason why the universe appears to be flat was because it was fantastically big, just the same way the spherical Earth appears flat to those on its surface. The observable universe is only an infinitesimal of the whole universe.

Questions:
Is Homogeneity required throughout the whole Universe which is quasi infinite in size?
Is the whole Universe that has become quasi infinite in size required to be created in a split second or can it be continuous process of creation?




The Big Bang and White Holes:

A more recently proposed view of black holes might be interpreted as shedding some light on the nature of classical white holes. Some researchers proposed that when a black hole forms, a big bang occurs at the core, which creates a new universe that expands into extra dimensions outside of the parent universe.

The initial feeding of matter from the parent universe's black hole and the expansion that follows in the new universe might be thought of as a cosmological type of white hole. Unlike traditional white holes, this type of white hole would not be localized in space in the new universe, and its horizon would have to be identified with the cosmological horizon.

Questions:
Can the big bang be considered to be a form of white hole, and can this be a continous process rather than a split second event?
Can a process of continous inflation drive the continous expansion of the observable universe we see today?
Tanelorn
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#3
Oct22-10, 06:53 PM
P: 695
Some possible cyclic universes:

http://en.wikipedia.org/wiki/Cyclic_model


What about a continuous recycling universe which is similar to the water cycle where a quasi infinite number of black holes collect matter and energy throughout the entire universe which is continuously recycled through a white hole and inflation/expansion?

http://en.wikipedia.org/wiki/Water_cycle


Brainstorming is a good thing, especially good for thinking up outrageous alternate realities!

Tanelorn
Tanelorn is offline
#4
Oct24-10, 01:54 PM
P: 695

Another large scale structure of the universe idea


I just watched a BBC Horizon documentary "Before the big bang". Fascinating stuff, it seems that the standard model is not acceptable as a complete explanation to many of the original believers. "Plenty of effect and not enough cause" Well the above is my outrageous contribution to such a speculative program :)

However, all of these proposed explanations at some point still require a truly enormous amount of space, time and energy to be created somehow. There is no avoiding it. If you say that branes were responsible then you have just moved the problem of creation one step further. ie what created the branes? If it is some kind of cyclical universe then what created the first cycle? We may be running around in circles.

In an almost infinite amount of time our observable universe is dissipating to the nothingness from which it apparently appeared.
Vanadium 50
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#5
Oct24-10, 02:17 PM
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Quote Quote by Tanelorn View Post
Brainstorming is a good thing, especially good for thinking up outrageous alternate realities!
Not here. Please reread the PF Rules on overly speculative posts.


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