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An international team of astronomers reports the discovery of a new protocluster of massive quiescent galaxies at a redshift of approximately 4.0. This is the first detection of a protocluster of this type at such a high redshift. The finding was detailed in a paper published Nov. 20 on the pre-print server arXiv.
Source: phys.org
protocluster redshift quiescent galaxies massive approximately0 nov pre-print