BEIJING (China Daily/ANN): A Chinese cosmic ray observatory has found 12 sources of ultrahigh-energy photons and detected a photon with a record-breaking energy level of 1.4 peta-electron volt, or 1.4 million billion electron volts, according to a study published in the journal 'Nature' on Monday (May 17).
Experts called these findings exciting, describing them as opening a new chapter in mankind's astronomical study of the most energetic particles in the universe, whose origins and acceleration mechanisms have fascinated and baffled scientists for over a century.