Largest radio telescope (ring reflector)

According to Official Guinness Records,

The RATAN-600 radio telescope completed in the Northern Caucasus, USSR in 1976 has 895 metal mirror panels mounted in a circle 576 m (1,890 ft) across. The reflecting panels are adjustable to allow radiation to be directed into a point where it is captured by a central cone-shaped reflector that directs it downwards into scientific instruments.

For a complete list of 1976 records, please visit 1976 Guinness Records in Russia.

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