Contact: Jack Burns
University of Colorado at Boulder
Caption: Pictured 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.
Credit: University of Colorado at Boulder
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