https://www.livescience.com/22499-phoenix-galaxy-cluster-by-the-numbers.html
Record-Breaking Phoenix Galaxy Cluster: By the Numbers | Live Science
Aug 19, 2012 - Some key facts about the faraway cluster, which may be the most massive ever found.
phoenix galaxy clusterby the numbersrecord breakinglivescience
https://www.sciencedaily.com/releases/2020/08/200831094732.htm
Can a black hole fire up the cold heart of the Phoenix Galaxy Cluster? | ScienceDaily
Radio astronomers have detected jets of hot gas blasted out by a black hole in the galaxy at the heart of the Phoenix Galaxy Cluster, located 5.9 billion...