Newly discovered galaxy cluster is 8.4 billion light years away and 'unexpectedly calm'
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Description
NASA Chandra X-ray telescope captured a view of distant galaxy cluster SPT-CL J2215-3537 (aka SPT2215). Full Story: https://www.space.com/unusual-galaxy-cluster-chaotic-early-universe
Credit; NASA/CXC/A. Hobart
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