Galaxy clusters are formed by a dense packing of many galaxies, making them the most massive structures in the universe.
Scientists have detected a surprisingly hot galaxy cluster dating back to the universe’s infancy. The cluster formed far earlier and burned far hotter than current models predict. Researchers believe ...
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The impossible cluster that rewrote early-universe heating
Just 1.4 billion years after the Big Bang, astronomers have identified a galaxy cluster “atmosphere” that appears far too hot ...
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