NASA Telescopes Spot Surprisingly Mature Cluster in Early Universe - NASA
NASA Telescopes Spot Surprisingly Mature Cluster in Early Universe - NASA
Most models of the universe predict that there likely would not be enough time and a large enough density of galaxies for a protocluster of this size to form only a billion years after the big bang.
in my opinion : it didn’t form quickly, neither did those early super massive black hole. The reason is that the universe is much much older than 14 billion years.