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NASA caught the sun smiling down on us, but the grin could signal a solar storm

NASA's Solar Dynamics Observatory captured an image of the sun "smiling" in 193 angstrom light on Oct. 26. (NASA/GSFC/SDO)
NASA's Solar Dynamics Observatory captured an image of the sun "smiling" in 193 angstrom light on Oct. 26. (NASA/GSFC/SDO)

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