Yerkes Observatory
| Title | Yerkes Observatory |
| View | Mars 1 |
| Series | II: Buildings and Grounds |
| Description | Mars, photographed by astronomer Edward Emerson Barnard with the Yerkes Observatory 40-inch refractor telescope, 1909. Above: Syrtis Major region, September 29, 3: 45 (UT); Below: Same; 4: 25 (UT). Each exposure is the superposition of three to five original frames. This reduces grain and brings out fine halftones. |
| Subject Terms | Mars (Planet) | Mars surface | Refracting telescopes | Astronomical photography |
| Photographer | Barnard, Edward Emerson, 1857-1923 |
| Photograph Date | 1909-09-29 |
| Physical Format | Photographic prints; 16.7 x 13.8 cm |
| Collection | Archival Photographic Files |
| Repository | University of Chicago Library, Special Collections Research Center |
| Image Identifier | apf2-08736 |
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