Development of the correlation of galaxies in an expanding universe.

Development of the correlation of galaxies in an expanding universe is represented by computer simulations. Periodic structure with cubic unit cells, each containing 400 galaxies, is assumed. A spatial correlation function with an index of approximately 2 is generated from motionless galaxies distributed at random as well as from a weak initial correlation. The characteristic length increases in such a way that the number of correlating galaxies increases; this gives a model for the formation of 'clusters' of galaxies. The ratio of potential energy to kinetic energy is nearly -3/2 in later stages of development. Hence the ratio in the present universe is expected to be close to -3/2.