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Harvard-Smithsonian Center for Astrophysics

Sun's Loops are Displaying an Optical Illusion

9 Jul 2013, 18:29 UTC
Sun's Loops are Displaying an Optical Illusion

July 09, 2013: The Sun's outer atmosphere, or corona, has posed an enduring mystery. Why is it so hot? The Sun's visible surface is only 10,000 degrees Fahrenheit, but as you move outward the temperature shoots up to millions of degrees.

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