Aurora Borealis

http://science.howstuffworks.com/nature/climate-weather/atmospheric/question471.htm

https://www.facebook.com/AuroraChet.Apichet
http://ffden-2.phys.uaf.edu/211.fall2000.web.projects/christina%20shaw/AuroraColors.html

Videos
http://www.northernlightscentre.ca/northernlights.html



http://www.cbsnews.com/8301-504784_162-57576308-10391705/absolutely-stunning-time-lapse-of-aurora-borealis/

http://www.youtube.com/watch?v=iQ1mwysxDIc