Two Million X-Ray Sources, and One Cluster That Doesn't Fit
Illustrative image The eROSITA telescope has released its second great catalogue of the X-ray sky with close to two million sources across half the sky, roughly double what it published before. Buried in it is a result from Bonn that matters more than the headline number. A team there went after the faintest part of a massive galaxy clus…
Source：Universe Today
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