The Sun actually gets hotter as you travel away from its surface, jumping from 6,000 K there to over 1,000,000 K a few million kilometers above in the corona. This effect contributes to solar flares that can damage earthbound electronics and we have no idea how it does this. But NASA is about to find out thanks to the IRIS (Interface Region Imaging Spectrograph) spacecraft that just launched from Vandenberg Air Force Base today.
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