  We show that when the neutrino minimal standard model ($\nu MSM$) with a
light sterile neutrino has a long range interaction between the neutrino vacuum
charge density and a dark U(1) gauge potential, late time acceleration is
dynamically realized. Moreover, the relation between the scale of dark energy,
the weak and Planck masses derived by Arkani-Hamed et. al
\cite{ArkaniHamed:2000tc} that addresses the coincidence problem arises
naturally in this model. Assuming that the cosmological constant is zero by
some as yet known mechanism, the only fine tuning in our model is the mass of
the sterile neutrino. We show that perturbations of the vector fields are
oscillatory and hence, there are no instabilities.
