Home Science Space Worlds biggest radio telescope detects two pulsars during trial run The Five hundred meter Aperture Spherical Telescope (FAST) in China has detected two pulsars since it started its trial run in September 2016. Reuters October 10, 2017 23:29 IST Close The Five hundred meter Aperture Spherical Telescope (FAST) in China has detected two pulsars since it started its trial run in September 2016.