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
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.