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How big are Auroras?

Updated: 8/17/2019
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15y ago

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Auroras have no definite size. They occur when charged particles from the Sun ionize particles in the upper atmosphere as they spiral in toward Earth's magnetic field. Auroras may be localized in one area, or may extend from horizon to horizon in the sky.

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15y ago
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Q: How big are Auroras?
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