SPACE PHOTOS THIS WEEK: Titanic Storm, Nanoflares, More

SPACE PHOTOS THIS WEEK: Titanic Storm, Nanoflares, More
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August 14, 2009--A false-color temperature map reveals solar activity close to the center of the sun's disk, as seen by Japan's Hinode satellite. Blue regions show where the plasma gets as hot as 18 million degrees Fahrenheit (10 million degrees Celsius).

Astronomers have puzzled for decades over why the sun's outer atmosphere, or corona, is so much hotter than the regions near its surface. Now, observations made with Hinode suggest that the culprits could be small, sudden bursts of heat and energy in the corona called nanoflares.
— Image courtesy Reale, et al. (2009)
 
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