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Author Topic: what is a universe  (Read 3209 times)

Offline ukmicky

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what is a universe
« on: 09/06/2005 01:30:44 »
Is there any scientific reason why our universe couldnt simply be a giant black hole
in a much larger universe. obviously our host universe would have to be different in the way it works but knowing what we know like the big bang theory , expansion , etc etc etc is there any reasons why it couldnt be possible.

« Last Edit: 09/06/2005 01:32:50 by ukmicky »


 

Offline chimera

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Re: what is a universe
« Reply #1 on: 09/06/2005 08:52:18 »
There are a few cosmologists that have speculated upon different scenarios not unlike yours, but the essential problem of what caused what originally, is only postponed and turned into a kind of chicken-and-egg problem.

Then I believe most theorists think any such world inside a black hole (be it a simple black hole or a Kerr one) would have to run backwards in time with respect to ours, causing all kinds of other problems, as you can imagine.

Time is a great teacher, but unfortunately it kills all its pupils - Hector Louis Berlioz
 

Offline ukmicky

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Re: what is a universe
« Reply #2 on: 10/06/2005 01:44:08 »


but if there are other universes then the chances are our model of a universe would differ to others. Time maybe a feature thats not the same for all. not only that but the physics of a host universe would have to be different to the physic's of the black hole universe's its spawned.
« Last Edit: 10/06/2005 01:46:20 by ukmicky »
 

Offline chimera

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Re: what is a universe
« Reply #3 on: 10/06/2005 11:02:03 »
The physics of any theoretical 'world' or universe would still have to be fine-tuned to make life possible at all. If the 'constants' of nature that we know are structurally different in such another universe, the 'laws of nature' *there* could prevent the formation of stars, galaxies, planets, etc altogether.

Which leads to the question whether our universe is the *only* type of configuration that is hospitable to our form of existance. We don't really know, but we do know that even fiddling with the values of those constants in the slightest, leads to disastrous scenarios for the development of such a universe.

Time is a great teacher, but unfortunately it kills all its pupils - Hector Louis Berlioz
 

Offline ukmicky

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Re: what is a universe
« Reply #4 on: 10/06/2005 22:11:21 »
The problem is we can only comment on what we observe.

Our constants of nature are in tune with the workings of our universe but if the possibility exists that there are other universes then the possibility has to exist that they could work and look different to ours, different parts of a big puzzle working together maybe for a common cause.

We have no idea what goes on inside a black hole the most we can do is study its effects on our side of the event horizon and our universe is such a fantastic place i canít believe that a black hole is just a giant garbage compacter
 

Offline chimera

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Re: what is a universe
« Reply #5 on: 11/06/2005 08:46:31 »
Flippantly put: every house needs a garbage container, and a 'recycling' one, preferably.

On our otherwise fantastic planet eventually everything gets mulled over by tectonic movement not once, but continously. It just goes very slow, but eventually what comes out at the other end (volcanic activity) can come as a violent surprise, but after some time it's the most fertile soil to be had on this planet.

So there is a logic behind it. Remember that in just about any theory black holes are not exactly everlasting.

Time is a great teacher, but unfortunately it kills all its pupils - Hector Louis Berlioz
 

The Naked Scientists Forum

Re: what is a universe
« Reply #5 on: 11/06/2005 08:46:31 »

 

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