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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