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Tuesday, 26 June 2012

Aurora Borealis : Natural Wonder Of The World

The northern lights are called polar lights. These are shafts or curtains of colored light visible on occasion in the night sky. Auroral light is mostly from electronically excited oxygen atoms

Excited nitrogen molecules and nitrogen molecular ions produce pink and red at low altitudes. Green radiation prevails at low altitudes and red at higher. Aurorae are produced by solar storms. 

The lights are at their most frequent in late autumn and winter/early spring. Between the autumn equinox and spring equinox (21 September - 21 March), it is dark between 6 pm and 1 am, and you have maximum chances of spotting the lights. 

  Aurorae are best seen for 2-3 hours around midnight. From December the weather dries up, and there is normally plenty of snow. In December or January, you experience the polar nights with atmospheric evenings and very short days. In February and March the days are longer and you see more of the snow-clad landscapes during daytime, and the evenings still offer maximum chances to spot the northern lights.

Some weeks, you can see fantastic displays, repeated several times during the evening. Other times, the snow falls densely, or the northern lights simply stay away. Naturally, the longer you stay and the more time you set aside.


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