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Sun unleashes biggest solar flare of the year

Xinhua)  16:20, April 16, 2013  

NASA's Solar Dynamics Observatory captured this image of a powerful M6.5 class flare, the strongest of 2013 at the time, at 3:16 EDT on April 11, 2013. This image shows a combination of light in wavelengths of 131 and 171 Angstroms. (Photo Source: NASA/SDO)


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(Editor:LiangJun、Yao Chun)

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