Patterns in Nature: Aurorae

雪儿 · 发表于: 2011-6-20 13:12:50

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Aurora Borealis, Churchill, Canada

Photograph by Norbert Rosing

An aurora borealis glows brightly over Churchill, Canada. Auroras occur when charged particles outside the Earth's atmosphere collide with atoms in the upper atmosphere. The result: a glowing display of curtains, arcs, and bands in the sky. The phenomenon is called aurora borealis or northern lights in the Northern Hemisphere and aurora australis or southern lights in the Southern Hemisphere.

雪儿 · 发表于: 2011-6-20 13:13:06

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Swirling Aurora

Photograph by Paul Nicklen

The sky over Yellowknife, Northwest Territories, Canada, churns with light from an aurora borealis.

雪儿 · 发表于: 2011-6-20 13:13:23

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Aurora Borealis, Manitoba, Canada

Photograph by Norbert Rosing

The northern lights turn the night sky an otherworldly green above Wapusk National Park in Manitoba, Canada.

雪儿 · 发表于: 2011-6-20 13:14:08

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Yellow-Green Aurora

Photograph by Norbert Rosing

An aurora borealis sends ribbons of yellow-green light through the sky over northern Canada.

雪儿 · 发表于: 2011-6-20 13:16:55

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Aurora Borealis, Twilight

Photograph by Norbert Rosing

The northern lights streak across the twilight sky.

雪儿 · 发表于: 2011-6-20 13:17:20

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Ghostly Aurora Borealis

Photograph by Norbert Rosing

The aurora borealis illuminates the heavens with ghostly patterns.

雪儿 · 发表于: 2011-6-20 13:17:36

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New York Aurora

Photograph by Julie Carragan

An aurora shimmers over Troy, New York, two days after the sun emitted a series of spectacular flares.

雪儿 · 发表于: 2011-6-20 13:17:49

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Aurora Borealis, Snow

Photograph by Norbert Rosing

The aurora borealis lights up the sky above a snow-covered Canadian homestead.

雪儿 · 发表于: 2011-6-20 13:18:07

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Northern Lights, Churchill, Canada

Photograph by Norbert Rosing

The northern lights arch above the treeline in Churchill, Manitoba, Canada.

雪儿 · 发表于: 2011-6-20 13:18:27

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Aurora Borealis, Northwest Territories

Photograph by Raymond Gehman

A subdued aurora fills the sky above the Mackenzie River in Canada’s Northwest Territories.

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