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2XMM J083026+524133 : ウィキペディア英語版 | 2XMM J083026+524133
2XMM J083026+524133 (2XMM J0830) is a very large galaxy cluster that lies 7.7 billion light-years away. It was discovered by ESA's XMM Newton and the Large Binocular Telescope (LBT) in Arizona in 2008.〔 http://astronomynow.com/080827XMMdiscoversmonstergalaxycluster.html "XMM discovers monster galaxy cluster", DR EMILY BALDWIN, ASTRONOMY NOW, August 27, 2008〕 As of 2008, it was the largest known galaxy cluster at red shift z ≧ 1, weighing in at an estimated 1015 solar masses. However, galaxy cluster XMMXCS 2215-1738 is several billion light years farther away.〔 http://www.physorg.com/news68820846.html ''Massive galaxy cluster found 10 billion light years away'' June 6th, 2006, Space & Earth magazine 〕 ==References==
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