AAPOD2 Image Archives
Northern lights over Helsinki
The Northern Lights, polar lights or aurora borealis as they are called are a once in a lifetime experience for many of us. The display of this astronomical phenomena can be experienced at places which are located at high latitude. They begin in the Earths atmosphere at altitudes from 60 to more than 250 miles—when charged particles from the sun become trapped in the Earth's magnetic field. The result is a colorful, dancing light show.