The Comoving proper distance between us and a distant galaxy has an interesting physical interpretation. Today, i.e., t = t0, we draw a sphere centered on us that touches the distant galaxy on its surface. The radius of this sphere is the comoving proper distance. In the coordinate system where the FRW metric is given by ds' = - c'd' + andr + Di(de' + since)do?)| sin(x). # R; > 0 with DA = \\ Rol S(r/ | Rol ) and S(x) = X. If flat | Rol - co sinh(x). # R;