Annual reports, 1904-1980.

Big Bear Solar Observatory

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Mount Wilson and Las Campanas Observatories

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Carnegie Institution of Washington.

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Mount Wilson Observatory

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Founded in December 1904 by George Ellery Hale and funded by the Carnegie Institution, the Mount Wilson Observatory quickly became one of the 20th century's major astronomical research centers. Located just north of Los Angeles high atop the San Gabriel Mountains, the observatory took full advantage of Southern California's clear nights and uniquely steady air. The observatory's 60" telescope completed in 1908 was the largest then in existence. In 1917, another Mount Wilson telescope, 100" in di...

Hale Observatories.

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Owned and operated by the Carnegie Institution of Washington, the Pasedena, Calif. observatories were known as the Mount Wilson Observatory (1904-1948), the Mount Wilson and Palomar Observatories (1948-1969), the Hale Observatories (1969-1980), and since 1980, the Mount Wilson and Las Campanas Observatories. This last site is in Chile. The observatories were jointly operated by Carnegie and the California Institute of Technology (1948-1980). From the description of Annual reports, 19...

Palomar Observatory

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Palomar Observatory is located in Pasadena, California, and is owned and operated by the California Institute of Technology. Built in 1928, it boasts several telescopes. However, the most famous is the 200-inch Hale Telescope built using a Pyrex blank manufactured by Corning Glass Works. The Hale Telescope was installed in 1948 and became fully operational and open to researchers in 1950....