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Colorful sky

The night sky is not 100% dark even in places like the Atacama Desert where is almost zero light pollution, the effect of the ultraviolet rays on the nitrogen a...
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The night sky is not 100% dark even in places like the Atacama Desert where is almost zero light pollution, the effect of the ultraviolet rays on the nitrogen and oxygen molecules in the atmosphere during the day is responsible for bringing light to the sky at night, this reaction is known as chemiluminescence where take place the atoms and molecules' excitement 80 km or higher in the thermosphere.
In the airglow spectrum, the brightest and most common emission is green 558nm light from the atomic oxygen radiation but in some cases, we can capture red light from OH radicals at 86-87km and yellow light from sodium atoms altogether.

Exif:
ISO: 1600, F1.4, 10sec
Camera: Sony A7III Full Spectrum using Visible + H-Alpha filter
Lens: Sony FE 24mm f1.4 GM
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