Also interesting! I did not consider counting the rings as you have. Your count number suggests that you counted flattened and standing crop to come up with the nine rings. However, when I did this, I could count either 9 or 10 within the spiraling points. Also very interesting; for astronomy buffs in particular! Our solar system's planet count has been in debate these past years with a new discovery (Sedna),and a new controversy (Pluto).

[link to en.wikipedia.org]

[link to en.wikipedia.org]

Perhaps this formation was designed to agree with all parties distinctions?

The other interesting fact remains 18/9 = 2 !