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The Aurora Borealis
1. The Aurora Borealis Click Mouse to advance Composer: Carl Orff ,in the year 1936 Perormed by : The Boston Symphany Orchestra MUSIC BY: Carmina Burana
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15. Since the World began, Solar Lights have been an Integral part of our planet Earth. They do not depend at all on the human activity, but rather on that of the Sun and the terrestrial magnetic field. The Dawn is not as one once believed (until some 70 years ago), that causes the reflection of solar light on the ices of the Arctic. However, it is indeed the Sun, which is responsible for the Polar Lights as the turbulent surface of the Sun rejects into the space the atoms and the subatomic particles (protons, electrons). At the time of violent solar storms, a great quantity of electrons and protons coming from the Sun arrive in the terrestrial atmosphere and activate the nitrogen and oxygen atoms, which become suddenly luminous and produce the splendid veils (ribbons or curtains) of coloured light, which are the polar lights. They are named Polar because once arrived in the terrestrial atmosphere, the particles are taken by the trap of the magnetic field, which forces them to move towards the magnetic poles either north (Northern Lights) or in the south (Aurora Australis) Dawn with the shape of a thin elliptic band (the auroral oval) is centred on the magnetic north and south poles, i.e. approximately within 700 meters of the geographical poles. The size of this form depends on the solar activity: the more the Sun is quiet" and the solar wind calm the oval is smaller; conversely the more the solar wind strikes the terrestrial magnetic field with force and gusto, more the dawn becomes broad and extends . A urore North & South
