Large Scale Structure of the Universe: Current Problems

The mean power spectrum of galaxies is compared with theoretical models. Possibilities to explain the observed power spectrum are discussed. Superclusters and voids form a quasi-regular lattice of mean cell size 120 Mpc; the main axis of the lattice is directed toward the supergalactic Y coordinate. Principal conclusions are that on scales around 100 Mpc the Universe is neither homogeneous nor isotropic and that some of the presently accepted cosmological paradigms need revision if the available observational data represent a fair sample of the Universe.