Contact: Susan Hendrix
NASA/Goddard Space Flight Center
Caption: This movie shows a coronal mass ejection (CME) on the sun from July 22, 2012 at 10 p.m. EDT until 2 a.m. July 23 as captured by NASA's Solar TErrestrial RElations Observatory-Ahead (STEREO-A). Because the CME headed in STEREO-A's direction, it appears like a giant halo around the sun. NOTE: This video loops three times.
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Related news release: NASA STEREO observes 1 of the fastest CMEs on record