XINHUA PHOTOS OF THE DAY

(240227) -- BEIJING, Feb. 27, 2024 (Xinhua) -- This composite photo taken on April 21, 2023 shows the Large High Altitude Air Shower Observatory (LHAASO) at an altitude of 4,410 meters on Mount Haizi in Daocheng County, southwest China's Sichuan Province. China's cosmic ray observatory has discovered a giant ultra-high-energy gamma-ray bubble structure, about ten million times larger than our solar system, in the Cygnus star-forming region, around 5,000 light years from Earth.

Based on the observations made by China's LHAASO, scientists identified that star-forming region as one source of the cosmic rays in the Milky Way with an energy level higher than 10 peta-electron volts (quadrillion electron volts or PeV), about 1,000 times more than the record high achieved by any manmade accelerator on Earth. (Xinhua/Jin Liwang)

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