Astrophysicists are rewriting their understanding of cosmic evolution following a groundbreaking James Webb Space Telescope galaxy cluster discovery. Looking back over 10 billion light-years into the deep cosmos, the premier observatory exposed an ancient cluster, known as XLSSC 122, packed with an unexpectedly dense concentration of dark matter. This massive structure formed much earlier in the universe’s timeline than traditional cosmological frameworks predicted, revealing a tight connection between scattered starlight and invisible dark matter.
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