What is the average number of sun spots on the sun?

Answer 1

The Sunspot Cycle
In the last few decades, the forces behind sunspots are becoming better understood, but we've known for over a 150 years that sunspots appear in cycles. The average number of visible sunspots varies over time, increasing and decreasing on a regular cycle of between 9.5 to 11 years, on average about 10.8 years. An amateur astronomer, Heinrich Schwabe, was the first to note this cycle, in 1843. The part of the cycle with low sunspot activity is referred to as "solar minimum" while the portion of the cycle with high activity is known as "solar maximum."


Theres a nice graph on the website below.

Answer 2

http://www.perseus.gr/Astro-Solar-Sunspots.htm
this is the site for sunspot images.
http://en.wikipedia.org/wiki/Sunspots
this is for information about it.
Take a look at it. It is very impressive.....

Answer 3

Probably more than 600.