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Podcast: Travelers In The Night
Episode: 159E-171-Planet's Airglow
Description: At the few remaining natural night sky viewing locations on Earth the horizon has a faint glow in every direction. Near the magnetic poles, this night glow appears to join with the relatively bright higher altitude aurora which covers larger portions of the sky and exhibits beautiful colors including green and red. Green light is the strongest component of the Earth' airglow and comes from oxygen atoms which have become energized by our Sun.