The Daily Galaxy on MSN

Astronomers stunned by ultra-hot galaxy cluster just 1.4 billion years after big bang

A newly discovered galaxy cluster, blazing with unexpectedly hot gas just 1.4 billion years after the Big Bang, is forcing ...
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Painting galaxy clusters by numbers (and physics)

Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand individual galaxies and huge reservoirs of superheated, X-ray-emitting gas. The ...