Moonrise & Earth Airglow | International Space Station
—Kimiya Yui 油井 亀美也
You will also notice green and yellow airglow that occurs when atoms and molecules in the Earth's upper atmosphere, excited by sunlight, emit light to shed their excess energy. Or, it can happen when atoms and molecules that have been ionized by sunlight collide with and capture a free electron. In both cases, they eject a particle of light—called a photon—in order to relax again. Unlike episodic and fleeting auroras, airglow shines constantly throughout Earth’s atmosphere, and the result is a tenuous bubble of light that closely encases our entire planet.
https://blogs.nasa.gov/spacestation/
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