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Does the fact galaxies are colliding go against the Big Bang theory of everything moving away from one another like an inflating balloon?

It would appear that if the Big bang theory is primarily based on the observation that everything is moving away from each other and a bit of back ground radiation. But if Galaxies are in fact colliding then surely this negates the big bang theory.

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    Sep 22 2012: Gotta take Gravity into consideration.
    • Sep 23 2012: i think gravity is accually slowing down the rate of expansion

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