The world’s largest radio telescope is open. FAST stands for Five-hundred meter Aperture Spherical Telescope. FAST’s nickname is Tianyan, which means “Eye of the Sky” or “Eye of Heaven”. It’s built in a natural depression in Guizhou, Southwest China.
https://www.sciencealert.com/china-s-huge-500-meter-fast-radio-telescope-is-finally-up-and-running