A Brief History

The Anglo-Australian Telescope was established after representations had been made to the Australian and British Governments in the mid-1960s by the Australian Academy of Science and the Royal Society of London. It was decided in April 1967 to build a large optical telescope, similar in design to the 3.8-metre telescope of the Kitt Peak National Observatory in the United States. A site for the telescope was chosen on Siding Spring Mountain, near the New South Wales town of Coonabarabran, where the Australian National University had operated an observatory since 1965.

A Joint Policy Committee with representatives of each government served as an executive body from 1967 to 1971, when it was succeeded by the present Anglo-Australian Telescope Board. The Board operates under the authority of the Anglo-Australian Telescope Agreement which came into effect in 1971. Under this agreement, the costs of construction, operation and maintenance of the telescope were to be shared equally between the two Governments, while observing time would be similarly shared between astronomers in Australia and the UK.

A Project Office to supervise the construction of the telescope was set up in January 1968 by the Joint Policy Committee. Some two to three years were required for the preparation of detailed design specifications and the letting of major contracts, awarded on an international basis to companies in Japan, Switzerland and the United States, as well as from Australia and the UK. Figuring of the mirrors was carried out by the British firm, Sir Howard Grubb Parsons and Company Limited. The telescope mounting and the drive and control systems were manufactured by Mitsubishi Electric Corporation of Japan. The telescope building and dome, constructed by the Australian companies Leighton Constructions Limited and Evans-Deakin Industries Limited, were completed by the end of 1972 and the structural components of the telescope itself were assembled during 1973. The final cost of construction was $A15 932 250.

Following a detailed process of installation and commissioning of instrumentation, the AAT was inaugurated on 16 October 1974 by His Royal Highness, Prince Charles.

The primary mirror, which has a usable surface of diameter 3.89 metres, was aluminised late in 1974 and scientific work commenced early in 1975. Regularly scheduled observations began on 28 June 1975.

In October 1974 the Board established temporary quarters in the grounds of the CSIRO Division of Radiophysics at Epping, a suburb of Sydney, to provide technical and administrative support for the telescope. Subsequently, the Board decided to maintain this establishment, known since March 1976 as the Laboratory of the Anglo-Australian Observatory (AAO), as a complementary facility to the telescope on Siding Spring Mountain. The AAO Laboratory provides office, laboratory, library and computing facilities for scientific work, the development of instruments and software, administration and visiting astronomers.