【#Tech24H】Based on observational data from the Large High Altitude Air Shower Observatory (LHAASO), the Institute of High Energy Physics of the Chinese Academy of Sciences has, for the first time, detected ultra-high-energy gamma-ray signals with energies exceeding 100 teraelectronvolts (TeV) within a special celestial system in the Milky Way. This discovery elevates research on such celestial objects to new heights and directly challenges existing theories of particle acceleration. Previously, the observed radiation energy of this system was no more than 10 TeV, and whether signals existed at higher energies was unknown. Now, leveraging the ultra-high sensitivity and broad energy coverage of LHAASO, researchers have extended the gamma-ray spectrum of LS I +61° 303 to 200 TeV, officially classifying it as an “ultra-high-energy gamma-ray binary”. [ By Zhang Liyan | Tang Ruohan ]