Visionary astronomer George Ellery Hale founded the Mount Wilson Observatory in 1904, high above Pasadena in Southern California's San Gabriel Mountains. At an elevation of 5,700 feet, with exceptionally stable air and nearly 300 days of clear skies annually, this prime location was deemed the perfect site to investigate the secrets of the universe. With funding from the Carnegie Institute of Washington, by 1917 Hale had constructed the world's first...