Varying Newton's constant: a cure for gravitational maladies?

TL;DR

This paper proposes that a slowly varying Newton's constant could explain various gravitational phenomena across different scales without invoking dark matter or dark energy, potentially impacting our understanding of gravity.

Contribution

It introduces a model where a varying Newton's constant accounts for gravitational observations without dark matter or energy, challenging standard cosmological theories.

Findings

A varying Newton's constant can explain planetary to cosmological phenomena.

The model aligns with existing observational bounds.

Implications extend to quantum gravity scales.

Abstract

We show that a slowly varying Newton's constant, consistent with existing bounds, can potentially explain a host of observations pertaining to gravitational effects or phenomena across distances spanning from planetary to the cosmological, relying neither on the existence of Dark Matter or (and) Dark Energy, nor on any expected high proportions of either of them in the Universe. It may also have implications at very short distances or quantum gravity scales.