20 Most Incredible Light Phenomena [pics]

Light Displays Aurora Image courtesy of US Air Force Senior Airman Joshua Strang The collision of electronically charged particles in the earth’s upper atmosphere often creates magnificent light displays over the polar regions. The colour depends on the elemental content of the particles – most auroras appear green or red due to oxygen, however nitrogen sometimes creates a deep blue or violet appe

[pho]

やっぱりオーロラすごいな