Australian Astronomical Observatory

Anglo-Australian Telescope

File:Aat telescope.jpg
Alternative names	AAO
Organization	AAO
Location	Coonabarabran, NSW, Australia
Coordinates	149° 03' 57.91" E, -31° 16' 37.34" S
Altitude	1164 m, 3819 ft
Weather	250 clear nights, 65% humidity
Website	www.aao.gov.au
Telescopes
Anglo-Australian Telescope 3.9 m reflector UK Schmidt Telescope 1.2 m reflector
Location of Anglo-Australian Telescope

The Anglo-Australian Observatory (AAO) is an optical astronomy observatory with its headquarters in suburban Sydney, Australia. It is jointly funded by the United Kingdom and Australian governments and operates the 3.9 metre Anglo-Australian Telescope (AAT) and 1.2 metre UK Schmidt Telescope (UKST) at Siding Spring Observatory, located near the town of Coonabarabran, Australia.

In addition to operating the two telescopes, AAO staff carry out astronomical research, as well as design and build innovative astronomical instrumentation for the AAT, UKST, and other telescopes including the European Southern Observatory's Very Large Telescope in Chile, and the Japanese Subaru Telescope on Mauna Kea in Hawaii.

The AAO has pioneered the use of optical fibers in astronomy, as a means for conducting light from many sources within the telescope's field of view into a spectrograph. The AAT's 2dF spectrograph can record spectra of up to 400 objects simultaneously over a 2° field (4 times the apparent diameter of the Full Moon), while the UKST's 6dF spectrograph can record spectra of up to 150 objects simultaneously over a 6° field. The 2dF Galaxy Redshift Survey (2dFGRS) and 2dF Quasar Survey (2QZ) on the AAT have yielded redshifts for 245,000 galaxies and 23,000 quasars respectively, probing the large scale structure of the Universe and placing new limits on Big Bang cosmology.

See also

List of astronomical observatories

External links

• Anglo-Australian Observatory
• 2dF Galaxy Redshift Survey
• 2dF Quasar Redshift Survey