McDonald Observatory was created in 1933.
The McDonald Observatory was established by the University of Texas at Austin in the 1930s. It was funded primarily through a donation from the estate of businessman William Johnson McDonald, after whom the observatory is named. The observatory was constructed in the Davis Mountains of West Texas, chosen for its ideal viewing conditions. It officially opened in 1939 and has since become a major center for astronomical research and education.
Haleakala Observatory was created in 1961.
Dearborn Observatory was created in 1889.
Kiso Observatory was created in 1974.
Stellafane Observatory was created in 1924.
Steward Observatory was created in 1916.
Union Observatory was created in 1903.
Erbil Observatory was created in 1973.
Sherwood Observatory was created in 1970.
McKim Observatory was created in 1884.
Belogradchik Observatory was created in 1961.
Winfree Observatory was created in 1900.