LHAASO is a world-leading ground-based facility for detecting high-energy gamma rays and cosmic rays. Its primary goal is to investigate the origin of high-energy cosmic rays and advance research in cosmic evolution, high-energy astrophysics, and dark matter.

The Large High Altitude Air Shower Observatory (LHAASO) has detected PeV (10¹⁵ eV) gamma-ray emission from a pulsar wind nebula powered by PSR J1849-0001 in the constellation Aquila, marking the discovery of a new PeVatron and posing a challenge to the classical theory of particle acceleration in pulsar wind nebulae.

Milestone results released by the Large High Altitude Air Shower Observatory (LHAASO) on November 16 have solved a decades-old mystery about the cosmic ray energy spectrum—which shows a sharp decrease in cosmic rays above 3 PeV, giving it an unusual knee-like shape.

At over 4,400 meters above sea level on the Qinghai-Xizang Plateau in Daocheng, southwest China's Sichuan Province, stands the world's most advanced cosmic-ray observatory – the Large High Altitude Air Shower Observatory (LHAASO). Since its completion in 2021, it remains the world's highest, largest and most sensitive observatory for detecting high-energy cosmic rays and gamma rays.