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Mystery over high-energy cosmic ray falling to Earth
The Guardian
|November 25, 2023
Astronomers have detected a rare and extremely high-energy particle falling to Earth that is causing bafflement because it is coming from an apparently empty region of space.
The particle, named Amaterasu after the sun goddess in Japanese mythology, is one of the highest-energy cosmic rays ever detected.
Only the most powerful cosmic events, on scales far exceeding the explosion of a star, are thought to be capable of producing such energetic particles. But Amaterasu appears to have emerged from the Local Void, an empty area of space bordering the Milky Way galaxy.
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