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Lunar circumzenithal arc, Dennis Lehtonen

Lunar circumzenithal arc

Lunar circumzenithal arc, Dennis Lehtonen

Lunar circumzenithal arc

Description

An upside-down rainbow in the night sky.

I went outside around midnight to see if theres any northern lights and saw a very colorful arc just above my head, thinking it was an odd aurora. After taking a picture I realized it was a circumzenithal arc. Usually they're formed by sunlight and ice crystals, but rarely by moonlight. 

Salla, Finland
26-27.Sept.2021

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Lunar circumzenithal arc, Dennis Lehtonen