Sun
| Title | Sun |
| View | Solar Activity 78:77 (2008-003) |
| Series | VI: Yerkes Observatory |
| Description | Enormous sunspot of 20 August 1919 (spectroheliogram enlarged). |
| Subject Terms | Sun--Surface | Sunspots | Solar phenomena | Spectroheliograms |
| Photograph Date | 1919-08-20 |
| Physical Format | Lantern slides; 5.5 x 7.5 cm |
| Collection | Archival Photographic Files |
| Repository | University of Chicago Library, Special Collections Research Center |
| Image Identifier | apf6-02275 |
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