Fatally. I knew exactly what it â¦ Puerto Ricoâs Arecibo telescope, once worldâs largest, collapses For five decades, Arecibo was the largest single-aperture telescope in the worldâ¦ Operated by the National Science Foundation through the â¦ It was the second largest radio telescope in the world and had been operating for more than half a century. Arecibo, the worldâs second-largest radio telescope, has broken. Following the collapse of the historic Arecibo Observatory in Puerto Rico, China has opened the biggest radio telescope in the world up to international scientists. ; As China 's â¦ China's Five-hundred-meter Aperture Spherical Telescope (FAST) is set to open its doors to foreign astronomers in a bid to attract top scientists from around the world. RATAN-600, The Worldâs Largest Radio Telescope Kaushik Patowary Jul 29, 2015 5 comments RATAN-600 (short for Radio Astronomical Telescope of the Academy of Sciences) is a radio telescope located near the village of Zelenchukskaya in the Caucasus Mountains, in Russia, at an altitude of 970 meters. For the second time this year, an important cable broke at the world's largest radio telescope, damaging the reflecting dish and putting the structure at the brink of â¦ The collapse stunned many scientists who had relied on what was until recently the largest radio telescope in the world. A 34-foot (10.4-meter) telescope located on La Palma of Spain's Canary Islands seized the top spot as the world's biggest ground-based optical telescope in 2009. It consists of a fixed 500 m diameter dish constructed in a natural depression in the landscape and it is the worldâs largest filled-aperture radio telescope. The Five-hundred-meter Aperture Spherical radio Telescope (FAST)) is a radio telescope located in southwest China. Around 8 a.m. on December 1, a 900-ton instrument platform that was suspended above the large, light-gathering dish collapsed. China's Aperture Spherical Radio Telescope (FAST) is the largest and last remaining giant, single-dish telescope after Arecibo's collapse. The observatory's main instrument was the Arecibo Telescope, a 305 m (1,000 ft) spherical reflector dish built into a natural sinkhole, with a cable-mount steerable receiver and several radar transmitters for emitting signals mounted 150 m (492 ft) above the dish. It destroyed the telescopeâs large dish. âIt sounded like a rumble.