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Giant Solar Filament Snakes Across Sun in Stunning NASA Photo - Space.com

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Space.comGiant Solar Filament Snakes Across Sun in Stunning NASA PhotoSpace.comA dark line more than half a million miles long curves across the lower half of the sun in a gorgeous photo snapped by a NASA spacecraft. The line is what scientists call a solar filament, a large region of dense, cool gas held in place by magnetic fields.

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