Cosmic webs

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Pictured at left is a portion of a supercomputer simulation of the universe showing a region roughly 1.5 billion light-years on a side. The bright object in the center is a galaxy cluster about 1 million-billion times the mass of the sun. In between the filaments, which store most of the universe’s mass, are giant, spherical voids nearly empty of matter. This image was constructed with the assistance of Matthew Hall, Advanced Visualization Group, National Center for Supercomputing Applications.

Image credit: Jack O. Burns, University of Colorado at Boulder, Center for Astrophysics & Space Astronomy

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