Lit-up gas clouds hint at galaxies’ violent pasts

Blobs known as voorwerpjes suggest intergalactic collisions took place long ago

Voorwerpje

GREEN GOBLIN  Filaments of gas known as voorwerpjes (green) orbit the galaxy UGC 7342 in this image from the Hubble Space Telescope. The galaxy is about 650 million light-years away in the constellation Coma Berenices.

NASA, ESA and W. Keel/University of Alabama, Tuscaloosa

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