Solar weather cycle

The solar cycle 1 1 year means that the distance between adjacent peaks or between adjacent valleys is 1 1 year.

This cycle can also be expressed as: the peak year to the next low year is 5.5 years.

This topic seems a bit biased. It is true that 2009 was a low year, but it should be inferred from the fact that 2003 was a high year. The peak year of 2003 was the result of actual observation.

It is difficult to determine whether it is 2008 or 2009 just based on the information given in the title.