Ritter Observatory was created in 1967.
Ritter Toggenburg was created in 1797.
Ritter Pázmán was created in 1892.
Ritter Blaubart was created in 1920.
Ritter House was created in 1796.
Morris Observatory was created in 1973.
Macfarlane Observatory was created in 1757.
Moore Observatory was created in 1978.
Behlen Observatory was created in 1972.
Jura Observatory was created in 1993.
Detroit Observatory was created in 1854.
Sphinx Observatory was created in 1937.
Armagh Observatory was created in 1789.