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A wide range of large scale observations hint towards possible modifications on the
standard cosmological model which is based on a homogeneous and isotropic universe …

We discuss the questions related to dark energy in the Universe. We note that in spite of the
effect of dark energy, large-scale structure is still being generated in the Universe and this …

Galaxy counts and recent measurements of the luminosity density in the near-infrared have
indicated the possibility that the local universe may be under-dense on scales of several …

The possibility that we live in a special place in the universe, close to the centre of a large
void, seems an appealing alternative to the prevailing interpretation of the acceleration of …

We review, compare and extend recent studies searching for evidence for a preferred
cosmological axis. We start from the Union2 SnIa dataset and use the hemisphere …

Constantly accumulating observational data continue to confirm that about 70% of the
energy density today consists of dark energy responsible for the accelerated expansion of …

Assuming the universe is spatially homogeneous on the largest scales lays the foundation
for almost all cosmology. This idea is based on the Copernican Principle, that we are not at a …

For precision cosmological studies it is important to know the local properties of the
reference point from which we observe the Universe. Particularly for the determination of the …

This paper looks at how inhomogeneous spacetime models may be significant for
cosmology. First it addresses how the averaging process may affect large-scale dynamics …