The Universe's early galaxies were engulfed in halos of high-energy cosmic rays. It's likely because they had tangled and turbulent magnetic fields. These fields accelerate cosmic rays to higher energies.
A Cosmic Noon Puzzle: Why Did Cosmic Noon Galaxies Emit So Many Cosmic Rays?
Universe Today - 15 Aug 2025 18:57
The Universe's early galaxies were engulfed in halos of high-energy cosmic rays. It's likely because they had tangled and turbulent magnetic fields. These fields accelerate cosmic rays to higher energies.
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