EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY EMILIO SEGRE VISUAL ARCHIVES / AMERICAN INSTITUTE OF PHYSICS / SCIENCE PHOTO LIBRARY
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Construction of Mount Wilson Observatory, 1904. Builders standing on scaffolding during the construction of the Mount Wilson Observatory in the San Gabriel Mountains, California, USA. They are building one of the stone piers that was used to support the Snow Solar Telescope. The Mount Wilson Solar Observatory, as it was then known, was founded in 1904 by George Ellery Hale. The Snow Solar Telescope was previously installed at Yerkes Observatory, but was moved to Mount Wilson in 1904 because of its sunnier, steadier skys. The telescope was operational by 1905 and the observatory became the world's foremost astronomical research facility, allowing Hale to found the new field of astrophysics.
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