The sunspots can be seen with the naked eye and the first records of sunspots are dated back to 800 B.C made by Chinese astronomers \cite{HSO}, while the first European records where done by Galileo Galilei and Thomas Harriot in 1610 by using a new telescope. In 1849 continuous daily observations
The sunspots can be seen with the naked eye and the first records of sunspots are dated back to 800 B.C made by Chinese astronomers \cite{HSO}, while the first European records where done by Galileo Galilei and Thomas Harriot in 1610 by using a new telescope. In 1849 continuous daily observations