ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY ROYAL ASTRONOMICAL SOCIETY / SCIENCE PHOTO LIBRARY
Mount Wilson Observatory. Dom of the 60 inch Hale telescope at the Mount Wilson Observatory in the San Gabriel Mountains, California, USA. The Mount Wilson Solar Observatory, as it was then known, was founded in 1904 by George Ellery Hale. The Hale telescope was operational by 1908 and at the time was the largest in the world. The Mount Wilson Observatory became the world's foremost astronomical research facility, allowing Hale to found the new field of astrophysics.
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