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'Cosmic joust': Astronomers observe pair of galaxies in deep-space battle

  • Astronomers observed two distant galaxies locked in a collision over 11 billion years ago, seen as the 'cosmic joust'.
  • The encounter involves one galaxy's quasar emitting intense radiation that penetrates and disrupts the other galaxy's gas clouds.
  • Using ALMA and ESO's Very Large Telescope in Chile, researchers resolved the galaxies' structure, previously seen as a single object.
  • The galaxies charged repeatedly at about 500 km/s, and the quasar's radiation damaged star-forming regions, reducing new star formation in the victim galaxy.
  • Researchers published these findings in Nature and expect future telescopes like ESO's Extremely Large Telescope to deepen understanding of quasars and galaxy evolution.
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The Killeen Daily HeraldThe Killeen Daily Herald
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Astronomers spot ‘cosmic joust’ for first time as two galaxies collide

The violent space collision occurred when one galaxy pierced the other with intense radiation.

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  • 56% of the sources are Center
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Phys.org broke the news in United Kingdom on Wednesday, May 21, 2025.
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