Northern
lights (aurora borealis) are a phenomena caused by solar eruptions
which generate solar winds.
Solar winds are then directed towards the earth which is protected
against magnetic storms by a magnetic belt.
The solar winds enter via the northern pole and the southern magnetic
pole.
Northern lights are created when there are too many particles.
The colors of northern lights correspond to the different gases in
the ionosphere. In northern lights, oxygen atoms give off red and
green light, depending on how high they are in the ionosphere. Nitrogen
molecules give off blue and violet light.
Just outside Longyearbyen in Adventdalen, an Auroral Station built
in 1978 works as an optical site for ground-based observations of
the dayside and nightside aurora. Data from this Auroral Station have
been used widely in publications throughout the last two decades of
auroral research.
Click
on the pictures to enlarge - Pictures taken in Longyearbyen
NORTHERN LIGHTS
