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If the Universe is indeed finite(in volume) 
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#1
Dec1012, 03:54 PM

P: 25

What pray tell, is the definitive proof? I ask this question upon reading a recent article regarding data from the WMAP probe suggesting that the Cosmos is flat. Now it did not specify whether this implies that the Cosmos is locally Euclidean or has a Euclidean spacial metric and zero mean curvature. If the latter is such, then this would most likely imply the shape of the Universe is best described by a noncompact manifold which implies that it is indeed infinite in size.
If there is enough evidence to demonstrate that the Universe has finite size, I'd like to see some of it if you wouldn't mind. 


#2
Dec1012, 04:25 PM

Mentor
P: 11,997

There is no concrete evidence that the Universe is finite at this time. I remember reading about a result saying the Universe was finite, but it was only about a 1.6 or 1.3 sigma result, meaning it isn't definitive at all. It could still go either way.



#3
Dec1012, 04:39 PM

PF Gold
P: 6,486

These days' Einsteins Theory of General Relatively has been shown to be correct to umpteen decimal places (more than Newton's was) BUT it is known to be "wrong" at least in the sense of being incomplete (no good at the quantum level), and thus is NOT called a "law". 


#4
Dec1112, 09:56 AM

Sci Advisor
P: 1,685

If the Universe is indeed finite(in volume)



#5
Dec1112, 04:34 PM

P: 25

IF the Universe is indeed shown to be infinite to say, 4σ at the very least, then I daresay that in itself will strike a fatal blow to the Big Bang Theory. For a Universe of finite size to reach infinite size in any finite amount of time would be topologically impossible. Nottomention a gross violation of the 1st law of thermodynamics to which AFAIK there is ZERO experimental or observational evidence which is in violation to it. 


#6
Dec1112, 04:38 PM

PF Gold
P: 6,486




#7
Dec1112, 04:46 PM

P: 25

By what known physical mechanism would this be possible? I wager that if the Cosmos is infinite space it is also infinite in time and has no end....and no beginning. 


#8
Dec1112, 05:06 PM

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P: 11,997




#9
Dec1112, 05:45 PM

Sci Advisor
P: 1,685




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