Astronomers have conclusively identified a source of the highest energy cosmic ray protons in the Milky Way, solving a long standing puzzle near the star Altair. By combining gamma ray, radio, and X-ray data from three separate observatories, a Hiroshima University led team ruled out competing explanations and confirmed the object as a genuine PeVatron. These natural particle accelerators are far more powerful than anything humans have ever built and helps us in the hunt for similar sources across the Galaxy.
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