The ripples forming a target like pattern were created after a storm in Bangladesh. The airglow is created by atmospheric gravity waves, which are waves of alternating pressure that can grow as the air thins. Airglow is not like an aurora because it is caused by chemiluminescence. Chemiluminescence is when light is produced in a chemical reaction. This photo is stunning. The contrasting colors are something unique. Personally, I think this is cooler than a rainbow after a storm.
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