Published on: 2025-08-06 12:04:56
The Perseus cluster is a vast swirl 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 a
Keywords: astronomers cluster dark matter perseus
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