Manastash Ridge Observatory was created in 1972.
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Stony Ridge Observatory was created in 1963.
Magdalena Ridge Observatory was created in 1999.
Oak Ridge Observatory was created in 1933.
The address of the Stony Ridge Observatory is: Po Box 892769, Temecula, CA 92584-8796
Jura Observatory was created in 1993.
Detroit Observatory was created in 1854.
Sphinx Observatory was created in 1937.
Ursa Observatory was created in 1926.
Carter Observatory was created in 1937.
Corralitos Observatory was created in 1961.
Stonyhurst Observatory was created in 1838.