Solar Luminous bridge

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American amateur astronomer Howard Eskildsen made ​​an unusual photo, luminous “bridge” on the Sun through one of sunspots, whose nature is not fully clear to astronomers. Approximate length of luminous “bridge” is 20 000 kilometers. Sunspots are dark and cold (relatively)  areas of the Sun, that appear in places of output of magnetic fields, impede exchange of plasma between internal and external layers of the star. Luminous “bridge” often appear before the separation of sunspots in two parts. 
[ad name=”Google Adsense-3 11″]  Some of the studies suggest that the processes taking place in magnetic fields and leading to emergence of luminous “bridge”, are similar with the processes  that generate  powerful  flash in the Sun.  Accordingly, it is possible that the luminous “bridge” is harbinger of a powerful flare on the sun.

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