Yerkes Observatory

Yerkes Observatory

Yerkes Observatory
Astronomical photographs 2
II: Buildings and Grounds
Calcium spectroheliogram (top) compared with a hydrogen spectroheliogram (bottom), the latter showing oppositely directed vortices in the two hemispheres. Taken at Yerkes Observatory, August 31, 1908.
Sun | Spectroheliograms | Astronomical photography | Astronomical spectroscopy
Photographic prints; 22.3 x 16.1 cm
Archival Photographic Files
University of Chicago Library, Special Collections Research Center

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