More than eight hundred ultradark galaxies were discovered in the Coma Cluster, and astronomers identified a previously unobserved ring of galaxies that spans 5.6 billion light-years, or 36 degrees in the sky, making it the second-largest structure in the universe, after the Hercules–Corona Borealis Great Wall, which was first noticed in 2013. | Harper's Magazine

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More than eight hundred ultradark galaxies were discovered in the Coma Cluster, and astronomers identified a previously unobserved ring of galaxies that spans 5.6 billion light-years, or 36 degrees in the sky, making it the second-largest structure in the universe, after the Hercules–Corona Borealis Great Wall, which was first noticed in 2013.

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More than eight hundred ultradark galaxies were discovered in the Coma Cluster, and astronomers identified a previously unobserved ring of galaxies that spans 5.6 billion light-years, or 36 degrees in the sky, making it the second-largest structure in the universe, after the Hercules–Corona Borealis Great Wall, which was first noticed in 2013.

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