Let $M$ be a compact real analytic Riemann surface. Is it true to say that: There are at most a finite number of disjoint simple closed geodesics on $M$. If the answer is yes put $m$= the sup of the number of such disjoint closed geodesics. what is a geometric interpretation for this geometric invariant $m$? For a given $n\in \mathbb{N}$ ,is there a real analytic riemannian metric on $S^{2}$ for which $m=n$