retrofutureground:Yerkes Observations, 1918 Solar Eclipse Expedition (part II) 1. Prominences arou
retrofutureground: Yerkes Observations, 1918 Solar Eclipse Expedition (part II) 1. Prominences around the sun taken with the 61.5-foot coelostat telescope at Green River, Wyoming. Photographed on the Yerkes Observatory expedition to Wyoming to record the total solar eclipse of June 8, 1918. 2. Corona of the sun taken through clouds with a 61.5-foot coelostat telescope using a 6-inch lens. Photographed on the Yerkes Observatory expedition to Wyoming to record the total solar eclipse of June 8, 1918. 3. Corona of the sun (1 second exposure). Photographed on the Yerkes Observatory expedition to Colorado to record the total solar eclipse of June 8, 1918. -- source link
#old photography#astronomy