Site of First Amateur Astronomical Observatory of Record in California

California State Historic Landmark 715

Plaque exists. No site exists. Landmark location.

Plaque Photo:

#715 Astronomical Observatory
On the knoll behind this marker, George Madiera built the first amateur astronomical observatory of record in California and there discovered the great comet of 1861 with a three-inch refractor telescope.

Site Photo:

No site exists.
No photo exists for this site.


Shake Ridge Rd, 1 mi W of Rams Horn Grade, outside Volcano.

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