Noctilucent Clouds Above Paris on a Summer’s Eve

July 19, 2021

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Photographer: Bertrand Kulik 

Summary Authors: Bertrand Kulik

Featured above are views of noctilucent clouds above Paris, France, as observed around 11:20 p.m., local time, on June 18, 2021. These high-altitude icy clouds form some 55 miles (88 km) above the Earth’s surface. Typically only seen in polar regions and in the high middle latitudes in spring and early summer, they appear to glow because they’re high enough to still be illuminated by sunlight that’s no longer reaching the surface far below.

Photo details:

Top photo - Canon EOS 5D Mark III; EF50mm; f/1.8; STM; ƒ/5.6 50.0 mm; 10 second exposure; 100 ISO.

Bottom photo - Canon EOS 5D Mark III; TAMRON SP 15-30mm; F/2.8; Di VC USD A012; ƒ/5.6 26.0 mm; 8 second exposure 100 ISO.

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