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Douglas K. Duncan at the coude focus of the 100-inch telescope, Mount Wilson Observatory. The curved interior walls of the observatory dome are seen in the background, behind Duncan and parts of the telescope. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Duncan, Douglas K Astronomers Scientists Eyeglasses Reflecting telescopes Telescopes Large astronomical telescopes Mount Wilson Observatory (Calif.) Astronomical observatories Portrait Photographs. (aat) Photographic prints. (gmgpc)