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| Description: Solar features Sunspots On the solar surface Dark center, the umbra, surrounded by a lighter region, the penumbra Dark color is due to a cooler temperature (1500 K less than the solar surface) Follow an 11-year cycle Large spots are strongly magnetized Pairs have opposite magnetic poles Picture Stats: Views: 339 Filesize: 1.08MB Height: 922 Width: 722 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=39780 |