Alaskan Sourdough Starter: I see and hear the light
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I See and Hear the Light


         The Northern Lights, or Aurora Borealis, are caused by an interaction between the surface of the sun and the Earth’s magnetic field. The sun ejects powerful clouds of gas called a coronal mass ejection. If one of these reaches the Earth it collides with the Earth’s magnetic field. This field is invisible, but if you could see it you’d witness an Earth that looks like a comet with a million mile long tail stretching behind it in the opposite direction of the sun.

         This collision generates currents of charged particles which flow along the lines of magnetic force into the Polar Regions. The particles are energized in the Earth’s upper atmosphere and when they c...

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