ERBU, Expanding Rubber Band Universe

TL;DR

The paper introduces a simple one-dimensional mechanical model called ERBU to illustrate key concepts of relativistic cosmology, emphasizing the connection between Hubble's law and universe homogeneity.

Contribution

It presents a novel mechanical analogue that helps visualize the relationship between cosmic expansion and homogeneity in relativistic models.

Findings

ERBU effectively demonstrates Hubble's law in a mechanical system.

The model clarifies the link between universe expansion and homogeneity.

It offers an intuitive tool for understanding relativistic cosmology concepts.

Abstract

I put forward a simple unidimensional mechanical analogue of the three-dimensional universe models of modern relativistic cosmology. The main goal of the proposal is the appropriate appreciation of the intrinsic relationship between Hubble's law and the homogeneity of expanding relativistic models.