This is one of the clearest pictures taken of our Sun. It was taken in 2002 from the Swedish Solar Telescope operating on the Canary Island of La Palma. The top of the picture contains mostly boiling granules while across the bottom a large sunspot appears. Some scientists believe sunspots are caused by intense magnetic activity, which inhibits convection by an effect comparable to the eddy current brake, forming areas of reduced surface temperature.
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