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Here, three images are combined to show varying temperatures. AIA 304, the chromosphere at 90,000 degrees Farenheit, is shown in red; AIA 211, the corona at 3.6 million degrees Farenheit, is green; and AIA 171, the corona at 1.8 million degrees Farenheit, is blue.
February 28, 2013 4:17 PM PST
Photo by: NASA/SDO
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