McDonald Observatory
| Title | McDonald Observatory |
| View | Astronomical Photographs 4 |
| Series | II: Buildings and Grounds |
| Description | Part of the Moon's surface showing craters and mountain chains. The double crater Theophilus, seen near the Moon's left edge is 64 miles across. Its circular walls rise 18,000 feet above the floor, and its tallest central peak, calculated from shadow length, is 6,000 feet high. A steep ridge runs from Theophilus to the ring plain Beaumont. Mädler, a small ring plain 20 miles in diameter, lies to the left of the crater. Photograph taken at the Cassegrain focus of the 82-inch McDonald Reflector. |
| Subject Terms | Moon--Surface | Lunar craters | Lunar basins | Astronomical photography |
| Photographer | Van Biesbroeck, George, 1880-1974 |
| Photograph Date | 1939-03-10 |
| Physical Format | Photographic prints; 17.6 x 18.1 cm |
| Collection | Archival Photographic Files |
| Repository | University of Chicago Library, Special Collections Research Center |
| Image Identifier | apf2-05106 |
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