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JJ Modig

Location of Photo:

ASKC Dark Sky Site

Date/Time of photo:

July 21 around midnight


Canon 300d with a Canon 28-70mm lens at 28mm f/5.6. 2 minutes exposure time. ISO 1600


I was taking some star trail pictures when I noticed these weird greenish clouds. I found out the next day that it was an uncommon atmospheric phenomenon known as airglow which is caused by a chemical reaction in the upper atmosphere.


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