NGC 5907: Clash of Dragons | Astronomy | Sci-News.com
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An international team of astronomers has found that extraordinary large loops of matter around the galaxy NGC 5907 are the relic of a gigantic collision between galaxies of similar sizes, which would have occurred 8 to 9 billion years ago.
NGC 5907 is a spiral galaxy lying in the constellation Dragon, showing gigantic loops and currents of stars in its surrounding halo.
Previously these 150 000 light-years loops were believed to be associated with the capture of a very small satellite galaxy...