A stunningly concentrated and hefty galaxy cluster, from a time in the universe's history when such massive structures aren't expected to have fully formed yet, is challenging cosmic evolution theories. Across a series of three recent papers, a team led by re…
A distant galaxy cluster as it has been observed by NASA's James Webb Space Telescope (JWST). At over 10 billion light-years away, the cluster XLSSC 122 is the most distant known example of a cluster… [+10390 chars]
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