Green 'airglow' spotted hanging over UK
Astronomers and 'aurora hunters' in the United Kingdom have reported sightings of a green 'airglow' in the night sky. The phenomenon, confusable with Aurora Borealis or the Northern Lights, is actually due to chemiluminescence. This is when some of the sun's energy excites and splits atmospheric oxygen molecules into atoms. The atoms then recombine, releasing light energy causing such 'airglows'.