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February 22, 2007
An X9-class solar flare on Dec. 5, 2006, recorded by the GOES-13 Solar X-ray Imager.
No Safe Place

The ESA-NASA Ulysses spacecraft has discovered that there is no place in the inner solar system completely safe from solar radiation storms.

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Image Credit: NOAA

February 20, 2007
Ulysses over the sun's South Pole, an artist's concept
A Cool Solar Mystery

One pole of the sun is cooler than the other. That's the surprising conclusion announced today by scientists who have been analyzing data from the ESA-NASA Ulysses spacecraft.

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Image Credit: ESA

February 7, 2007
artist concept of Ulysses at sun's south pole
South Pole Flyby
(NASA Feature)

Less than one hundred years ago, the south pole of Earth was a land of utter mystery. Explorers labored mightily to get there, fighting scurvy, wind, disorientation and a fantastic almost-martian cold. Until Roald Amundsen and Robert F. Scott reached the Pole in 1911 and 1912, it was terra incognita.

The situation is much the same today—on the sun.

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See Also: NASA-European Spacecraft Swoops Under Sun's Pole (NASA News: Exploring the Universe)

Image Credit: NASA/JPL.

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