Largest radio telescope (ring reflector)
Who
RATAN-600 radio telescope
Where
Russian Federation (Northern Caucasus)
When
1976
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.