Major breakthroughs in China's science and technology in 2021

8. Scientists find particles of ultra-high energy in Milky Way

According to a study published in the journal Nature on May 17, China's Large High Altitude Air Shower Observatory, or LHAASO in Daocheng, Sichuan province, has found 12 sources of ultra-high-energy photons in the Milky Way and detected a photon with a record-breaking energy level of 1.4 peta-electron volt, or 1.4 million billion electron volts.

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.

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