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Video: NASA captures footage of an X-class flare erupt from the Sun

Extraordinary footage of sun releasing an X-class flare caught on camera by NASA. Images of the flare were captured by NASA's Solar Dynamics Observatory. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground, however -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel. Credit: The Mars Underground

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