Part of the new year’s first big display of northern lights, an aurora borealis appears to dip into the mountains near Tromsø in northern Norway on January 7.
In the ionosphere of the Earth, speeding electrons collide violently with gas atoms, which gives the gas atoms energy, which causes them to release both light and more electrons. In this way, the gases of the ionosphere glow and conduct flowing electric currents into and out of the polar region. Or simply ‘Northern
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