Ultra-High-Energy Cosmic Rays Come From Galaxies Far, Far Away (3 of 7) (IMAGE)

American Association for the Advancement of Science (AAAS)

Ultra-High-Energy Cosmic Rays Come From Galaxies Far, Far Away (3 of 7)

Caption

A water-Cherenkov detector seen against the night sky at the Pierre Auger Observatory in western Argentina. This material relates to a paper that appeared in the Sept. 22, 2017, issue of Science, published by AAAS. The paper, by The Pierre Auger Collaboration, and colleagues was titled, "Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 1018 eV."

Credit

Steven Saff

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