A Simplified Model for the Big Bang

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This Demonstration simulates something like the "Big Bang" for a closed universe in 2D in which the critical mass is exceeded. It allows you to change the inertia of the galaxies and to study their movements. One whole cycle goes from the explosion (the Big Bang) up to the final implosion (the Big Crunch).
Contributed by: Arthur Stammet (March 2011)
Open content licensed under CC BY-NC-SA
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"A Simplified Model for the Big Bang"
http://demonstrations.wolfram.com/ASimplifiedModelForTheBigBang/
Wolfram Demonstrations Project
Published: March 7 2011