The Parkes Radio Telescope is probably the best-known astronomical observatory in Australia.
Construction of the giant 210 foot (64 metre) parabolic dish for the CSIRO was begun in 1959 and it was completed and commissioned in 1961.
The design was an inspiration for the Deep Space Networks 64 metre antennas at Goldstone and Tidbinbilla (which were later enlarged to 70m) and the 70m at Madrid. The telescope has an altazimuth mount, but uses a small master equatorial mount to which the alt-az structure is slaved hence the dish can be driven as if it were on an equatorial mount.
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Parkes under construction, May 1961.
The Opening Ceremony.