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Originally Posted by GoinAllTheWay
Really? Crap, I have a lot to try to figure out then.
The part of about the balloon was kinda based on when you said:
run everything backwards and come back to a point where everything was on top of each other.
I think this is were I'm getting into trouble. Imagine all matter in space is gone. Now insert a chunk of rock the size of say, a soccer ball. In the middle of the soccer ball is an eplosive, set off that explosive and you will create a debris feild that travels in all directions. Now freeze that debris field and I kinda figured it would still resemble a sphere. Hope you are following me here. Unfreeze that and everything continues to travel in all directions kinda like a balloon filling with air. In the middle of that balloon is where the exposion originally took place.
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That's why I said the explosion idea is a really bad one, the big bang is nothing like an explosion.
If you explode the soccer ball, you're still exploding that soccer ball in an existing space, and the pieces are moving outwards in an existing space.
In the big bang, space itself is getting bigger. That's why I use the surface of the balloon, because the surface represents everything that exists.
Quote:
Originally Posted by GoinAllTheWay
Am I way off with that? I assumed when you said the surface of the balloon, you were reffering to the exteme edge of that debris feild. Clearly this is the part I'm not getting my head wrapped around.
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Sorry yeah.. There's no "edge" of the debris field because the debris fills the universe equally everywhere.
When the universe was very dense there was no matter, only energy, so that energy filled the universe pretty much uniformly. As the universe expanded it cooled, and eventually matter could form. It would form pretty much uniformly across the whole universe.
The Cosmology Tutorial is pretty good:
http://www.astro.ucla.edu/~wright/cosmo_01.htm