Stony Ridge Observatory
Sierra Madre, CA
City
Stony Ridge Observatory is an astronomical observatory built by and for amateur astronomers in the mountains of Los Angeles County, California, in 1957. When installed, its 760 mm Newtonian-Cassegrain likely ranked as 8th largest of all telescopes in California, and one of the largest amateur telescopes in the United States.
From Wikipedia, CC BY-SA 4.0
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