# The Return of a Static Universe and the End of Cosmology

## TL;DR

The paper argues that in the far future, evidence of the universe's expansion and Big Bang origins will vanish, leading to a static universe scenario and the end of cosmology as we know it.

## Contribution

It presents a theoretical analysis showing the eventual disappearance of key cosmological evidence, suggesting a fundamental limit to observational cosmology.

## Key findings

- Future observers will lack evidence of expansion and the Big Bang.
- The universe will appear static and de Sitter-like in the far future.
- This marks the theoretical end point of cosmological knowledge.

## Abstract

We demonstrate that as we extrapolate the current $\Lambda$CDM universe forward in time, all evidence of the Hubble expansion will disappear, so that observers in our "island universe" will be fundamentally incapable of determining the true nature of the universe, including the existence of the highly dominant vacuum energy, the existence of the CMB, and the primordial origin of light elements. With these pillars of the modern Big Bang gone, this epoch will mark the end of cosmology and the return of a static universe. In this sense, the coordinate system appropriate for future observers will perhaps fittingly resemble the static coordinate system in which the de Sitter universe was first presented.