The universe seen at different scales

TL;DR

This paper explores how small-scale inhomogeneities in the universe, when averaged, can influence large-scale observations and dynamics, and discusses their relation to gravitational entropy.

Contribution

It analyzes the impact of averaging small-scale inhomogeneities on large-scale cosmological models and their implications for gravitational entropy.

Findings

Averaging small-scale structures affects large-scale cosmological observations.

Inhomogeneities may alter the dynamical relations at cosmic scales.

Discussion on the connection between inhomogeneities and gravitational entropy.

Abstract

A large-scale smoothed-out model of the universe ignores small-scale inhomogeneities, but the averaged effects of those inhomogeneities may alter both observational and dynamical relations at the larger scale. This article discusses these effects, and comments briefly on the relation to gravitational entropy.