Like an ant looking up at window curtains , aurora frequently appear as huge flowing light displays. These colorful, often spectacular phenomena are most frequently visible from locations near the Earth's poles. Aurora are caused by electrons from the solar wind funneling to Earth along magnetic field lines , and striking atoms and molecules in our atmosphere. Auroral color is determined by which atmospheric ions are struck and recombine to form neutral atoms. It is still controversial whether aurora make any sound audible from the ground.
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