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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 produced.
- Atomic nitrogen causes blue displays.
- Molecular nitrogen results in purple.
- Green light typically appears in areas up to 150 miles high, red above 150 miles, blue at up to 60 miles, and purple and violet above 60 miles.
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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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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....
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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 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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Creating gradients
In this activity, we will build up colour, working with two colours and transitioning from one to the other.
- Use colours close together on the colour wheel to create harmony, such as green and yellow, blue and purple, red and orange.
- Mix two separa...
Organizing Our Worskapce: The Influence of Colors
- Red accelerates the heart rate, giving you a jolt of energy. Your eye is instantly drawn to red, and it promotes physical activity and emotion.
- Orange is a social color, encouraging interaction. It works well in meeting rooms or other social spaces...
The Psychological Effects of Color
While most perceptions of color are subjective, some color effects have universal meaning.
- Colors in the red area of the color spectrum are known as warm colors and include red, orange, and yellow. These warm colors evoke emotions ranging from feelings of warmth and comfort ...
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