The 100-inch telescope, its tube 20 degrees from horizontal, pointing south, Mount Wilson Observatory. Seen from the west. The steel pedestal is seen at the far left. The observatory's interior balcony surrounds the base of the telescope. A curved ladder is seen at the left; the interior walls of the observatory are seen in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
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