What is airglow, a component contributing to the faint night luminescence?

Answer

Weak light emission by Earth's own atmosphere due to chemical reactions.

Airglow is a very weak emission of light by the Earth's own atmosphere, caused by various chemical reactions, such as the recombination of atoms previously split by solar radiation during the day.

What is airglow, a component contributing to the faint night luminescence?

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Why is it Dark at Night? - YouTube

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