The Perseus cluster is a vast collection of thousands of galaxies, all bound together by gravity. Famed for its unbelievable size — containing the mass of some 600 trillion suns — it also has a reputation for being one of the few "relaxed" galaxy clusters out there: it shows no signs of having undergone a powerful but disruptive merger with another galaxy, which is how these clusters typically grow. In a word, Perseus looks settled down and pretty stable. But that may not be the case, according to an international team of astronomers. As detailed in a study published in […]

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Link :
https://futurism.com/dark-matter-bridge-galaxy-cluster