The mystery
of the Auroras
If you are standing in Alaska, Canada, or the Northern United States on
a clear dark night and looking up into the sky, you may see a bright
greenish-white band of light that stretches across the sky. Right now you
are seeing the Northern Lights, also known as the Aurora Borealis. These
types of lights also occur near the South Pole, where they are known as
the Southern Lights or Aurora Australis. But why and how do these
lights occur?
Earth is constantly bombarded with debris, radiation and other
magnetic waves from space that could threaten the future of life, as we
know it. Most of the time, the planet's own magnetic field does an
Video
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