Union Observatory was an astronomical observatory at Johannesburg in South Africa. It was known as Republic Observatory after 1961.

It went through a number of name changes:

• Transvaal Meteorological Department 1903 – 1909
• Transvaal Observatory 1909 – 1912
• Union Observatory 1912 – 1961
• Republic Observatory 1961 – 1971

Its directors were:

• Robert Innes 1903–1927
• Harry Edwin Wood 1927–1941
• Willem Hendrik van den Bos 1941–1956
• William Stephen Finsen 1957–1965

External links

• http://www.saao.ac.za/assa/html/his-pl-obs_-_republic.html