Aurora Borealis/Virmalised

http://en.wikipedia.org/wiki/Aurora_Borealis

http://www.exploratorium.edu/learning_studio/auroras/happen.html

http://www.nasa.gov/worldbook/aurora_worldbook.html

PHOTOS,SLIDESHOWS
http://www.metacafe.com/watch/500268/nasa_video_about_the_aurora_borealis/

http://virtual.finland.fi/finfo/english/aurora_borealis.html

http://virtual.finland.fi/Nature_Environment/aurora/index.html

http://virtual.finland.fi/finfo/english/aurora_borealis2.html

http://personal.inet.fi/koti/tom.eklund/aurora.html

http://www.geo.mtu.edu/weather/aurora/

NASA Connect Segment exploring the Aurora Borealis or Northern Lights.