https://www.nasa.gov/mission_pages/chandra/news/galaxies-go-on-a-deep-dive-and-leave-fiery-tail-behind.html
A group of galaxies is plunging into the Coma galaxy cluster and leaving behind an enormous tail of superheated gas. Astronomers have confirmed this is the longest known tail behind a galaxy group and used it to gain a deeper understanding of how galaxy clust…
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