  Astronomical observations strongly suggest that our universe is now
accelerating and contains a substantial admixture of dark vacuum energy. Using
numerical simulations to study this newly consolidated cosmological model (with
a constant density of dark energy), we show that astronomical structures freeze
out in the near future and that the density profiles of dark matter halos
approach the same general form. Every dark matter halo grows asymptotically
isolated and thereby becomes the center of its own island universe. Each of
these isolated regions of space-time approaches a universal geometry and we
calculate the corresponding form of the space-time metric.
