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