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JEM-EUSO on the International Space Station (ISS) is a new type of observatory that uses the Earth’s atmosphere as a detector of high-energy particles.
The origin of Ultra-High Energy Cosmic Rays (UHECRs) remains a great mystery. The extremely energetic sources that produce them are still unidentified. Recent data have confirmed their extragalactic nature but have questioned their composition and increased the mystery behind it. To identify the first source a significant increase in the observed cosmic rays of extreme energies (around 10
eV) is needed.
JEM-EUSO is designed to increase the number of observed Extreme Energy Cosmic Rays (EECRs) by an order of magnitude during its mission.
13 Countries, 77 Institutes and about 280 researchers are collaborating in JEM-EUSO, with the support of the most important International and National Space Agencies and research funding institutions. NASA began supporting the mission in 2013.