In 2004, Argentina began using 1,660 water tanks to detect cosmic rays and help scientists study the most powerful particles from space

The Pierre Auger Observatory uses 1,660 water tanks across Argentina to detect cosmic rays. These tanks detect faint light produced by particles from atmospheric air showers. Solar-powered stations and fluorescence telescopes work together to study these events. This hybrid system allows scientists to measure cosmic ray energies and directions. The observatory investigates particles with extraordinary energies from the universe.
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