This photo taken on Feb. 27, 2024 with infrared camera shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST), the world's largest single-dish radio telescope, has identified more than 900 new pulsars since its launch in 2016, its operator said Wednesday. (Xinhua/Ou Dongqu)