What is 'airglow' a natural source of residual light in the night sky?
Answer
A faint emission of light caused by the recombination of atoms ionized by solar radiation during the day
Airglow is a natural phenomenon where the atmosphere emits a faint light as atoms and molecules recombine after being ionized by solar radiation, converting chemical energy into photons even after sunset.
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Why is it Dark at Night?
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