World's largest ever radio telescope to be completed in SW China (4)

PINGTANG, June 29, 2016 -- Combo photo taken on Aug. 2, 2015 (L, up), Dec. 16, 2015 (R, up), March 9, 2016 (L, bottom) and June 29, 2016 (R, bottom) show different assembling stages of the reflector of the Five-hundred-meter Aperture Spherical Telescope, or "FAST," in Pingtang County, southwest China's Guizhou Province. FAST, the world's largest ever radio telescope, has a dish-like reflector, which is 500 meters in diameter and made up of 4,450 panels. Now technicians have assembled 99.8 percent of the panels. The assembling work of the reflector will be completed on July 3. The telescope will be used to detect and collect signals and data from the universe. (Xinhua/Ou Dongqu)