Cassegrain spectrograph attached to the Hooker 100-inch telescope, Mount Wilson Observatory. The photograph is taken inside the observatory dome, and a viewing platform with a chair is visible in the center. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Spectrograph Reflecting telescopes Large astronomical telescopes Cassegrainian telescopes Astronomical observatories Observatory domes Elevating platforms Chairs Interiors Mount Wilson Observatory Mount Wilson (Calif.) Photographic prints. (gmgpc)
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