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An incredible display of banded airglow that filled the entire sky early on the morning of August 5, 2005, at the annual Nebraska Star Party in Merritt Reservoir, Cherry County. Atmospheric gravity waves – propagating upward into Earth’s mesopause – disturb the homogeneous green airglow layer (90 – 100 km), causing stripes and bands that can easily be seen with the naked eye from dark observing sites. Their color is only detectable in long exposure photography. For more information see this page at Atmospheric Optics.

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