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Infinite Universe?

H

hisgrace26

Guest
One of the laws of physics is based upon the notion that energy cannot be created nor destroyed, it can only change forms. Our laws of physics would suggest that the energy that exists in our universe today has existed eternally in some form or another. Infinity and eternity are not concepts that humans easily comprehend. We tend to think in the 'finite', births, deaths, beginnings and endings. It is actually much harder to think in terms of infinity and eternity, but in order to explain the current energy of the universe, you ultimately end up thinking in such terms. :)

That law only apply after the universe existed. Because that law is a law of nature it does not apply when nature does not exist. So the universe could not have exist eternally because the scientific evidence says otherwise. :)
 
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elahmine

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I was watching a program recently that said that physicist have found that the universe is probably infinite in size. Does anyone know if this is true? Is it no possible that the universe could be like a sphere, so that if you go one direction, you will end up where you started?

I just find it hard to accept that anything is actually infinite.

Well as it turns out, it is most likely that universe is curved and yes if you started out in one direction you will end up where you started. Of course, that depends on whether or not you could ever go far enough in one direction to end up where you started. ;) At least that's what heard from Brian Schmidt last semester.
 
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