Massive double Sunspot 1263 - wider than the Earth - harbors energy for powerful X-class solar flares!
Double sunspot 1263 is a whopper. Its two dark cores are each wider than Earth, and the entire region stretches more than 65,000 km from end to end. The clarity of image is impressive. Note the granulation of the stellar surface surrounding the main dark cores.
August 02, 2011