The 50-foot interferometer, Mount Wilson Observatory. Photographed from the north. A small building built into the hillside is seen below the left end of the interferometer. Trees are in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Interferometers Astronomical instruments Mount Wilson Observatory Astronomical observatories Buildings--California--Mount Wilson--Photographs Trees Photographic prints. (gmgpc)
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