The Mount Wilson Solar Observatory was founded in 1904 by George Hale, who was also a trustee of Throop Polytechnic Institute (which later became Caltech). The first telescope built on-site was the Snow Solar Telescope in 1904, followed closely by the 60-foot Solar Tower and the 60-inch telescope, both of which were completed in 1908. Hale hosted many famous individuals during this time, including Andrew Carnegie in 1910 and Harlow Shapley in 1914. Carnegie was the main financial supporter of...