The long-time exposure photo taken on July 25, 2022 shows a night view of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province.

Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. It is believed to be the world's most sensitive radio telescope. With FAST, scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on July 25, 2022 shows a night view of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province.

Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. It is believed to be the world's most sensitive radio telescope. With FAST, scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken with a fisheye lens on July 24, 2022 shows a night view of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) under maintenance in southwest China's Guizhou Province.

Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. It is believed to be the world's most sensitive radio telescope. With FAST, scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

The long-time exposure photo taken on June 27, 2016 shows a night view of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province.

Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. It is believed to be the world's most sensitive radio telescope. With FAST, scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)

Photo taken on March 29, 2021 shows an interior view of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province.

Located in a naturally deep and round karst depression in southwest China's Guizhou Province, FAST started formal operation in January 2020 and officially opened to the world on March 31, 2021. It is believed to be the world's most sensitive radio telescope. With FAST, scientists have identified over 660 new pulsars. (Xinhua/Ou Dongqu)