Aurora

Andrew J. Waskey

AN AURORA IS a colored display of light usually seen at night. They are natural, and occur more commonly in the polar regions than in temperate southern regions in the Northern Hemisphere or more temperate northern regions in the Southern Hemisphere. Auroras occur most frequently in the Northern Hemisphere around the time of the autumn equinox in September and October and at the spring equinox in March and April. Auroras are sometimes called polar auroras (aurorae polaris) , or in the Northern Hemisphere, aurora borealis . A popular name in the Northern Hemisphere is the northern lights; in the Southern Hemisphere they are the southern lights or the aurora australis (Latin for southern is australis) . The aurora borealis begins with a magnetic storm on the sun. If the sun emits an extra mass of particles in a solar aurora ...

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