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light pillars near Antwerp, Belgium
Gas flames and spotlights from a petrochemical plant in the port of Antwerp reflect off transparant layers of cirrostratus. Picture taken from Itegem, Belgium, on October 25, 1976 at 7:35 pm. Exposure: 180 seconds at f/1.8. Distance between light source and camera: 31.6 km. (19.6 miles). Altitude of reflective layer: approximately 4.8 km (3.0 miles).

[© Frans VAN LOO - photo used with permission]