Contact: Susan Hendrix
NASA/Goddard Space Flight Center
Caption: A giant sunspot appeared on Feb. 25, 2014, for its third trip across the face of the sun. This blend of two images from NASA's Solar Dynamics Observatory shows the sunspot in visible light and an X-class flare observable in ultraviolet light.
Credit: NASA/SDO/Goddard Space Flight Center
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Related news release: Giant sunspot makes third trip across the sun