Millennium Simulation

Here's a nice animated 'flythrough' of the current distribution of galaxies and galaxy clusters, produced from the results of 2005's Millennium Simulation. This simulation was able to take the initial distribution of matter, inferred from observations of the cosmic microwave background radiation, and by applying a 'cold dark matter' model, was able to reproduce the current galaxy distribution some 10 billion or so years later. No doubt, there was some 'parameter-fitting' going on, but it's impressive nevertheless.