FAST has discovered 44 new pulsars so far.

A worker maintains China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province, Sept. 11, 2018.

FAST has discovered 44 new pulsars so far.

China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province on Sept. 11, 2018.

Staff members work at a control center of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province, Sept. 10, 2018.

China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province on Sept. 11, 2018.

Staff members work at a control center of China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province, Sept. 10, 2018.

China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) in southwest China's Guizhou Province on Sept. 11, 2018. (Photos: Xinhua)