Image of the Dark Matter density
A projection of the dark matter density of the million solar mass proto-galaxy within which the first star is formed. The image is roughly 300 parsec (=1000 light years across). A number of satelite DM clumps that are in the process of merging with larger one can be seen. The substructure seen is typical for very hig resolution N-body simulations. With more than a million particles within the halo this is one of the highest resolution DM simulations ever done. The big difference to other simulations however is that we not only follow DM but also gas at even much greater mass and spatial resolution.