Yerkes Observatory
| Title | Yerkes Observatory |
| View | Sunspots 3 |
| Series | II: Buildings and Grounds |
| Description | Sun with numerous spots. |
| Subject Terms | Sun | Sunspots | Solar activity | Astronomical photography |
| Photograph Date | 1926-09-20 |
| Physical Format | Photographic prints; 22.9 x 21.3 cm |
| Collection | Archival Photographic Files |
| Repository | University of Chicago Library, Special Collections Research Center |
| Image Identifier | apf2-08918 |
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