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Topic: universe

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very very small tic
Posts : 70

Posted 11/02/2007 03:18:42 PM

Send a private message to very very small tic

http://damtp.cam.ac.uk/user/gr/public/inf_lowden.html

saucer
admin
Posts : 673
A Good Tautology is Hard to Find!
saucer

Posted 04/03/2007 03:30:25 PM

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?Cosmology

The study of the cosmos as a whole or cosmology has drastically changed within the last century. With the advent of the General Theory of Relativity and discoveries made by astronomers such as Edwin Hubble as early as 1920s, cosmology became a much more distinct science than astronomy.

Two important topics that revolutionized cosmology are inflationary cosmology and quantum cosmology (applying the laws of the quantum physics to understand the whole universe).

The standard models of cosmology -- the big bang theory without the inflationary theory -- had to suffer from the three problems, namely, the smoothness problem, the horizon problem and the flatness problem. The first problem asks why the matter is uniformly distributed in the universe. The second problem concerns the large-scale uniformity of the observable universe. Finally, the third problem asks why the universe is close to being spatially flat.

However, with the introduction of Inflationary Cosmology in 1970s, cosmologists were able to explain all of the three problems of the standard cosmology.

According to inflationary cosmology, the size of the universe expanded exponentially to an extremely huge number (1060) of its original size. This happened in a very short time from 10-35 to 10-32 seconds after the big bang.

Today cosmologists work with some of the most interesting concepts such as black holes, wormholes, dark matter and dark energy. They also deal with some of the most intriguing and yet fundamental questions about the universe such as:

What is the overall shape and size of the universe?
How old is the universe?
What is the fate of the universe?
Can physics describe what was happening before the big bang?
What happens to the notion of Space and Time before big bang?

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--Last edited by saucer on 2007-08-26 23:53:07 --

zee
Posts : 115

Posted 21/03/2007 09:10:16 AM

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http://www.physics.cz/research/main.php?go=relvak&lang=en

saucer
admin
Posts : 673
A Good Tautology is Hard to Find!
saucer

Posted 27/03/2007 08:29:54 PM

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COSMIC INFLATION [ Age of the Universe.]

Omega[sub Baryon] agrees with BBN [ BB Nuclear synthesis theory], at z = 10 to 9. ..!!

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--Last edited by saucer on 2007-08-26 23:54:17 --

zee
Posts : 115

Posted 02/05/2007 09:48:00 PM

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interest!

http://www.universetoday.com/

zee

ferme
Posts : 85

Posted 19/05/2007 10:29:16 PM

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Iseason,

Scientists believe that our universe exists within a metaverse (meta-universe). The metaverse is timeless and eternal because it is an absolute void and totally unmanifest.

AND;

The hidden dimensions and unseen realms make up a much larger proportion of the universe than the physical parts which are visible to us – physicists know this and call the unseen parts "dark matter" and "dark energy". Conventional science has not yet theorised a plan of these higher dimensions so we must look to ancient knowledge and alternative science for the answers. ferme...

--Last edited by saucer on 2007-08-26 23:53:28 --

saucer
admin
Posts : 673
A Good Tautology is Hard to Find!
saucer

Posted 03/06/2007 03:34:56 AM

$/!\ Delete the topic$

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http://www.astro.psu.edu/research/theory.html

saucer
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very very small tic
Posts : 70

Posted 08/06/2007 03:21:19 PM

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Cosmology -

Einstein's equations can do more than just give us models for specific phenomena such as black holes or gravitational waves; they can also be used to describe the universe as a whole. On the basis of general relativity, physicists, mathematicians and astronomers have developed the so-called big bang models. They describe how our universe evolved from an extremely hot and dense early phase to its present state.

A key property of these models is that the universe has to change over time. Einstein's equation simply do not allow for a stable, eternally unchanging cosmos. According to the big bang models, any universe has to either expand or collapse. Our own universe is expanding, with characteristic consequences for astronomical observation.

--Last edited by saucer on 2007-08-26 23:53:49 --

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