Revisiting the Cosmological Principle in a Cellular Framework
  The Cosmological Principle in it's various versions states that: (i) the Galaxy does not occupy a particular position, (ii) the Universe is homogeneous and isotropic. This statement does not agree with the recent astronomical observations in the range z lower than 0.05 which are in agreement with a cellular structure of the Universe. Here we present a local analysis of the inhomogeneity of the Universe. When z is greater than 0.05 our analysis cannot be applied because the astronomical sample of galaxies here processed is not complete. The two tools of the Poisson Voronoi tessellation (PVT) and the luminosity function for galaxies allow of building a new version of the local Cosmological Principle. 
L. Zaninetti
astro-ph.CO