Quote:
Originally Posted by EdwardSinclair
What I have problems with, is understanding how the universe can be finite, if the law of conservation of energy states that energy cannot be created nor destroyed, that it merely changes from one form to another.
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The universe appears to be finite because it is 13.7 billion years old. Light travels at 186000 miles/second, so the further out you see something the further in the past you're looking. i.e. a galaxy that's 2 million lightyears away is 2 million years in the past. So you can't see anything further out than 13.7 billion lightyears because that would be before the big bang.
Quote:
Originally Posted by EdwardSinclair
I have heard and read about Big Crunch and Bing Bang theories, and find them interesting, but fail to understand how the university could collapse under it's own weight, and the restart!
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That is a theory. It depends on the amount of mass in the universe, and if it will produce enough gravity to eventually stop the expansion of the universe and bring everything back into a singularity.
Our universe is most likely a "white hole", which is the other end of a black hole. So if you've ever wanted to know what it looks like inside a black hole, just look around.
08-17-2012
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