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Uploaded on Dec 1, 2010
Sunspots are temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to surrounding regions. They are caused by intense magnetic activity, If the sunspot were isolated from the surrounding photosphere it would be brighter than an electric arc . nspots expand and contract as they move across the surface of the Sun and can be as large as 80,000 kilometers (49,710 mi) in diameter.Manifesting intense magnetic activity, sunspots host secondary phenomena such as coronal loops and reconnection events.