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PINGTANG, China (Xinhua) — Workers work at a construction site of the 500-metre Aperture Spherical Telescope, or “FAST”, in Pingtang County, south-west China’s Guizhou Province, June 29, 2016. FAST, the world’s largest ever radio telescope, has a dish-like reflector, which is 500 metres in diameter and made up of 4,450 panels. Now technicians have assembled 4,443 panels. The telescope will be used to detect and collect signals and data from the universe. (Photo: Xinhua) 
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