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Sun Coronal Loops 2

Image of Sun Coronal Loops 2
CORONAL LOOPS: A close-up view of the Sun's edge, observed by NASA’s Transition Region and Coronal Explorer (TRACE) mission, shows vast loop structures made of superheated plasma, just one of which is the size of about ten Earths! The plasma reaches temperatures of more than 1,000,000˚K (~1,800,000˚F)—where the Sun’s surface temperature averages about 5700˚K (~9800˚F)! These active regions contain multiple loops, often in “tunnel” formations, that can persist for several weeks in the absence of a solar flare. Why do such seemingly unstable structures persist? The leading theory is that the magnetic field which causes the loop to form holds energy which converts to heat. Image Credit: NASA/Stanford-Lockheed Institute for Space Research’s TRACE Team
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