Astronomers found a giant intergalactic “wall” of galaxies hiding in plain sight

Astronomers have found one of the largest structures in the known universe—an intergalactic “wall” of galaxies that’s at least 1.4 billion light-years long. And given how close it is to us, it’s remarkable that we haven’t seen it before now. What happened: An international team of scientists reported the discovery of the South Pole Wall…
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