https://spaceref.com/science-and-exploration/hubble-pinpoints-largest-protocluster-of-galaxies-ever-seen-2/
Hubble Pinpoints Largest Protocluster of Galaxies Ever Seen - SpaceRef
May 24, 2013 - Space news and reference site.
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https://www.astronomy.com/science/subaru-telescope-discovers-the-most-distant-protocluster-of-galaxies/
Subaru Telescope discovers the most distant protocluster of galaxies | Astronomy.com
May 18, 2023 - categories:Galaxies, Science | tags:News
protocluster of galaxiessubaru telescopethe mostdiscovers