sunspots and sunflare

SUNSPOTS: 

                The sunspots were first discovered by Galileo in 1610The existence and a cyclic variation in the number of sunspots was firmly established in the mid 19-th century Heinrich Schwabe. He calculated the sunspots cycle to be approximately 11 years. sunspots are dark as these are regions of cooler gases on the solar surface. Individual spots have a black centre, known as Umbra .The grey Penumbra outlines this area. Sunspot’s are regions of very strong magnetic fields of intensity of several thousand’s Gauss. Sunspots occure in groups of two to several.

SOLAR STROM & SOLAR FLARE :   

                 

                   

                         Sunspots are very active regions of the sun. Infact the sun is said to be quite very few sunspots are seen. The most violent phenomenon that occurs in these centers of activity involves the transformation of a considerable amount of energy, of nearly 10 32 to 10 33 ergs, probably stored in the high magnetic fields of the sunspots in a relatively short period of about half an hour. This phenomenon is called a solar strom. The most spectacular of these is the Solar Flare