The Sun’s Green Rim Observed from Arroyo de San Serván, Spain

August 27, 2020

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Photographer: Juan Manuel Pérez Rayego 
Summary Authors: Juan Manuel Pérez Rayego; Jim Foster

The photo above showing the green rim of the Sun’s trailing rim was captured at sunset from Arroyo de San Serván, Spain. As the Sun sets, if atmospheric conditions are favorable (relatively clear and not optically thick), there’s a chance you might detect an emerald-colored lining on the Sun’s upper rim. This occurs because when the Sun is near the horizon the atmosphere can behave like a prism and as a result sunlight is separated into different colors. However, the green rim is best seen when the Sun is actually a degree or two above the horizon.  Note that the wind turbine silhouetted against the Sun’s disk is in Portalegre, Portugal, about 57 miles (92 km) away from my location. Always use caution when looking toward the Sun. Photo taken on June 14, 2020.

Photo Details: DSLR (x1.6) + 400 mm; f / 5.6; 1/1250 sec. exposure; ISO 100.