The Arecibo Telescope was a 305 m (1,000 ft) spherica... - dofaq.co
arecibo telescope

The Arecibo Telescope was a 305 m (1,000 ft) spherica...

wikipedia - 04 Dec 2020
The Arecibo Telescope was a 305 m (1,000 ft) spherical reflector dish built into a natural sinkhole at the Arecibo Observatory. A cable-mount steerable receiver was mounted 150 m (492 ft) above the dish, and several radar transmitters for emitting signals. Completed in November 1963, the Arecibo Telescope was the world's largest single-aperture telescope for 53 years, surpassed in July 2016 by the Five-hundred-meter Aperture Spherical Telescope (FAST) in China.

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