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Auroras on other worlds
Auroras also occur on planets such as Jupiter, Saturn, Uranus, and Neptune. These gas giants have thick atmospheres and strong magnetic fields. These auroras are a little different from Earth's as they are formed under different conditions.
Venus has an aurora generated by its magnetotail. Mars experiences local auroras due to magnetic fields in the crust. There are also northern hemisphere auroras caused by particles hitting the Maritan atmosphere.
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Cycles and particles
Northern lights occur roughly every eleven years. Record-keeping of the sun's activity began in 1749. Since then, there have been 22 full cycles.
Particles ejected from the sun travel 93 million miles toward Earth before they are drawn toward the magnetic north and south poles. As the par...
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The best places to see the northern lights
The best places to see the northern lights are Alaska and northern Canada, Norway, Sweden, and Finland. During periods of particularly active solar flares, the lights can be seen in Scotland and northern England.
Winter is usually the best time to see the northern lights, due to lower leve...
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The display of colors
The colours of a aurora boralis are pink, green, yellow, blue, violet, and occasionally orange and white.
- When the particles mix with oxygen, yellow and green are produced.
- When the particles interact with nitrogen, red, violet, and blue colours are produce...
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The northern lights, or aurora borealis
The magnetic fields of the sun distort and twist as the Earth rotates on its axis. When these fields become knotted together, they create sunspots. Usually, these sunspots occur in pairs.
As the temperature on the surface of the sun rises and falls, the sun boils and bubbles. Particles esc...
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