30-09-2015 18:01 via scitechdaily.com

New Phoenix Cluster Observations Provide A Fresh Perspective

Astronomers have discovered giant holes, or cavities, in the hot gas that pervades the Phoenix Cluster, revealing new details about this remarkable system. Galaxy clusters are often described by superlatives. After all, they are huge conglomerations of galaxies, hot gas, and dark matter and represent the largest structures in the Universe held together by gravity. […]
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