Second Highest-Energy Cosmic Ray Ever Detected

Named the Amaterasu particle, its energy surpasses theoretical limits, challenging existing understanding of particle physics.

Scientists at the University of Utah and the University of Tokyo have detected the second highest-energy cosmic ray ever, named the Amaterasu particle, with an energy of 2.4 x 1020eV.
The Amaterasu particle was detected by the Telescope Array in Utah, which consists of 507 surface detector stations covering 700 km2.
The trajectory of the Amaterasu particle appears to originate from the Local Void, an empty area of space bordering the Milky Way galaxy.
The energy of the Amaterasu particle surpasses the theoretical limit known as the Greisen-Zatsepin-Kuzmin (GZK) cutoff, challenging existing understanding of particle physics.
The Telescope Array is currently expanding, with 500 new detectors being added to cover an area nearly the size of Rhode Island, in hopes of capturing more events and providing further insights into these phenomena.