The long-time exposure photo taken on July 24, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 25, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 25, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 24, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 24, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 25, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 24, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

Aerial photo taken on July 25, 2022 shows China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province. Using FAST, or the "China Sky Eye," scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)