Siding Spring Observatory

Aerial view of Siding Spring Observatory.
Siding Spring Observatory is Australia's largest optical astronomy facility. It is located 27 km west of Coonabarabran on Siding Spring Mountain in New South Wales, at an altitude of 1,165 m (3,785 ft). Its main instruments are the 3.9-m (154-in) Anglo-Australian Telescope and the 1.2-m (48-in) UK Schmidt telescope.