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Originally Posted by kosh
So the universe is not actually about 15billion years old, only the matter contained within it?
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I dunno really, it would depend on what you define as the 'universe'. Does the universe include all of the 'nothing' into which it is expanding? How can 'nothing' be said to have an age? I guess I'm saying yes - I can only see the matter within the universe as we know it having an age of approx. 15 billion yrs.
The void that the universe is expanding into would have had to pre-exist the universe, otherwise how could the universe expand into it?
And gravity - what the heck is it anyhoo? You can see it's effect on everything, but where does this force actually come from? Can anyone show me a gravitron particle please....
Basically it makes my head hurt hehe... I think I'll just look at the heavens and go 'wow' instead
