Varying G dynamics

TL;DR

This paper proposes that a time-varying gravitational constant G can explain galactic rotation curves and Pioneer spacecraft anomalies, offering an alternative to dark matter and dark energy explanations.

Contribution

It introduces a model where a varying G over time accounts for observed astrophysical anomalies, challenging existing dark matter and dark energy paradigms.

Findings

Varying G explains galaxy rotation curves without dark matter.

A time-dependent G accounts for Pioneer spacecraft acceleration.

Supports alternative gravity models over standard cosmology.

Abstract

In this paper it is shown that dynamics based on a variation of the gravitational constant $G$ with time solves several puzzling and anomalous features observed, for example the rotation curves of galaxies (attributed to as yet undetected Dark matter). It is also pointed out that this provides an explanation for the anomalous acceleration of the Pioneer space crafts observed by J.D.Anderson and co-workers.