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Tuesday, October 7, 2008 |
Tuesday, October 7, 2008 |
Photo: Sun's "Ring of Fire" Stoked by Sound WavesFor decades scientists have been puzzled by the fact that the chromosphere is hotter than the sun's surface. New research suggests that the region gets its heat when magnetic fields allow sound waves to shoot out of the sun's interior. Image courtesy NASA/UCAR/NCAR/High Altitude Observatory
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ADVERTISEMENTNATIONAL GEOGRAPHIC'S PHOTO OF THE DAY |
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