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Computing the X-Ray Universe Movie: text

How are they simulated?

The calculation begins roughly one billion years after the big bang, when the universe was denser and more uniform than it is today. In this illustration, a closed two-dimensional universe is represented as the surface of an expanding sphere.

The calculation is performed in a patch hundreds of millions of light years on a side, which is large enough to fairly represent the universe as a whole. The calculation follows the growth of initially small matter density fluctuations as the universe expands.

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NCSA. Last modified, 10/12/95