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Last Post 3/20/2008 9:38 AM by  Jim Stryder
Essay about Sunspots
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3/4/2007 3:26 PM
    Do you think this is an okay explaination of sunspots? Sunspots By: James W. Sunspots are created on the surface of the sun but can stretch down towards the sun’s core. Sunspots are made where there are strong magnetic fields. The magnetic fields prevent the heat that is coming from the inside of the sun to rise in the normal way it is supposed to. As a result the hot material is slightly cooled by the magnetic fields therefore creating a darker spot on the sun that we know as a sunspot. The light and temperature are the two main reasons that the color of a sunspot is darker than that of the surrounding area. If the light is less focused or ‘intense’ on one area then it seems darker and if the temperature around the sunspot is hotter, than it looks more like the rest of the sun. Some of the magnetic fields are created by temporary disturbances on the sun’s surface and are key in creating a sunspot. Some of the sun’s sunspots are the size of the Earth! Their size usually decreases and increases about every 11 years. Sunspots have two ‘layers’. There is the dark, inner core which is called the ‘umbra’ layer and the lighter, outer core which is called the ‘penumbra’ layer. Even though scientists know so much about sunspots they really don’t know how deep they go, but soon scientists hope to use a method that we use here on earth. When an earthquake occurs we can use their waves to ‘see’ inside the Earth. Scientists hope to use the same method using the waves of ‘sunquakes’ to see inside the sun.

    Jim Stryder



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    3/4/2007 9:42 PM
    Hi James, I'd say that sounds pretty good! By the way, that 11 period you mention. It's officially known as the "Solar cycle", a revolving period of high, and low points in solar activity, such as sunspots, solar storms, etc. Were about to start coming into another "high" cycle, so expect to see more and more sunspots, etc, over the coming years! Thanks for visiting Solar Week!

    Jim Stryder



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    3/20/2008 9:38 AM

    Hi again James,

    Thought I'd add somethng additional. Did you know that a diagram used to study sunspots, is known as the "butterfly" diagram?

    You can see more about it here; http://www.nasa.gov/visio...cle_graphics_prt.htm

    Its been used since around the year 1880, and when all the data thats been collected was put into graphic form, it was like "magic", suddenly there was a series of butterflies! Enjoy.

    Jim Stryder

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