Country-size array of radio antennas could trace ultra–high-energy particles back to supernovae and black holes



Summary

Scientists propose building a vast array of radio antennas, potentially spanning entire countries, to detect ultra-high-energy cosmic rays. These cosmic rays, the most energetic particles known, likely originate from distant, powerful events like supernovae and black holes. By analyzing the faint radio signals produced when these particles interact with the Earth’s atmosphere, researchers hope to trace their paths back to their sources. This could finally reveal the long-standing mystery of the origin of ultra-high-energy cosmic rays and offer insights into the extreme environments where they are created. The massive scale of the detector is necessary to capture the extremely rare and weak signals.

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