The video contrasts the simulations in several ways. Moving planes that slice through the cubes produce more quantitative 2-D analyses of the structures. We're using sophisticated graphics techniques to a much greater degree than ever before. The final segment of the videotape flies the viewer through one of the simulations. Each galaxy and its dark-matter halo is encased in a colored ball, coded to represent its mass.
Larger shapes encompass the major clusters of galaxies.
The beautiful sequence illustrates both the extraordinary size of the universe and the limited extent of our knowledge about how it has evolved. We don't yet have an overall theory of the universe. We don't even know what it's mostly made of. That all may change by early in the next decade, Primack noted. New astrophysical satellites and ground-based experiments promise to probe ever further back to the imprints of the Big Bang.