THE BEST PICTURES OF EARTH: Reader Picks of NASA Shots

THE BEST PICTURES OF EARTH: Reader Picks of NASA Shots
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4. The Southern Lights (January 25, 2006)

The aurora australis, or southern lights, glimmer green over Antarctica in the picture above.

Four days after a massive solar flare, NASA researchers obtained readings from the now-defunct IMAGE satellite, which monitored Earth's magnetic field.

Overlaying the data onto a "Blue Marble" satellite photograph of Earth resulted in both the image above and an animation of the solar storm's effects on Earth's atmosphere.
—Image courtesy NASA, Earth Observatory
 
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