Pierre Auger Observatory

20043,000 km2 areaInternational

LocationArgentina

Year2004

Size3,000 km2 area

OperatorInternational

About Pierre Auger Observatory

The largest cosmic ray detector in the world. Covers 3,000 km2 of Argentine pampas. 1,660 water Cherenkov detectors. Detected the highest energy particles in the universe. Proved that ultra-high-energy cosmic rays come from outside the Milky Way.

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