What is Chinese Tianyan?China's Tianyan, officially known as the Five-hundred-meter Aperture Spherical Telescope (FAST), is the world's largest and most sensitive Radio telescope, and also the largest single aperture and most sensitive Radio telescope in China's scientific and technological history.Located in the invisible valley of Pingtang County, Qiannan Buyei and Miao Autonomous Prefecture, Guizhou Province, China's Tianyan covers about 30 football fields and is composed of 4450 triangular reflectors, which can cover the whole southern hemisphere sky...