Sydney Observatory site for 160th anniversary publication. Exterior, shadows of afternoon. Cover image The Story of Sydney Observatory.

Historic Site

Permanent Exhibition
Temporarily closed Sydney Observatory

Sydney Observatory is temporarily closed for heritage maintenance works. Please sign up here to receive updates when we re-open in 2022.

Sydney Observatory is a museum and education centre set in gardens overlooking Sydney Harbour. The historic site commands some of the best views in Sydney.

A short history of Sydney Observatory

Built in 1858, Sydney Observatory is one of the most significant sites in the nation’s scientific history. It is recognised as an item of ‘state significance’ by the New South Wales Government and is heritage listed.

Beginning as the centre of scientific research for the colony of New South Wales, the Observatory has a seminal role in the history of timekeeping, meteorology and astronomy in Australia. Now known as Observatory Hill, the site was previously known as Windmill Hill, Citadel Hill, Fort Phillip and Flagstaff Hill. Each name indicates the site’s function over time all of which relied on it being the highest point over Sydney Harbour.

In the 19th and early 20th centuries, the Observatory was essential to shipping, navigation, meteorology and timekeeping as well as to the study of the stars seen from the Southern Hemisphere. Government Astronomers worked and lived in the building until 1982 when Sydney Observatory became part of MAAS.

Some of the greatest scientific contributions of the Observatory include its participation in the ambitious Astrographic Catalogue and its contribution to Australian Meteorology. The Astrographic Catalogue which was one of the largest international scientific projects of the 19th century, with the goal to photograph the entire celestial globe. Sydney Observatory committed to this collaborative project in 1887. For almost a century, generations of astronomers and female computers measured the position of over 430,000 stars within Sydney’s sky zone (-52 to -64 degrees).

Meteorological work was amongst the most important work undertaken at the Observatory. The first Government Astronomer William Scott presented monthly ‘progress reports’ on meteorology that were published in the Sydney Morning Herald and the Government Astronomer Henry Chamberlain Russell later published the first Australian weather maps in 1877. Meterological duties were then transferred to the Bureau of Meteorology in the early 1900’s, with the Bureau’s first offices within the Observatory building until its relocation in 1927.

Today the Observatory is a museum and public observatory with an important role in astronomy education and public telescope viewing. It contains an 1874 29cm lens telescope, a 42cm computer-controlled telescope and a hydrogen-alpha solar telescope, able to be viewed through by visitors during booked sessions among many other activities.

NSW Government Astronomers

These men and their families lived and worked at Sydney Observatory. They were:

  • William Scott 1858–1862
  • George Robarts Smalley 1864–1870
  • Henry Chamberlain Russell 1870–1905
  • Henry Alfred Lenehan 1907–1908
  • W E Raymond (Officer-in-charge) 1908–1912
  • William Ernest Cooke 1912–1926
  • James Nangle 1926–1941
  • Harley Weston Wood 1943–1974
  • William Humphrey Robertson 1975–1982

Heritage buildings and gardens

The Observatory buildings, built from stone with distinctive copper telescope domes, were built between 1857 and 1859 in the Italianate style. They combined the practical needs of an observatory with those of an astronomer’s residence. The Observatory grounds recreate the original layout and vegetation of formal gardens cultivated in the 1880s.

Plan Your Experience

All the information you need to plan your visit is available on the Sydney Observatory venue page, including:

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