Nano-constraints on the spatial anisotropy of the Gravitational Constant

TL;DR

This paper consolidates experimental data to set extremely tight limits on any spatial anisotropy of the gravitational constant G, effectively refuting recent claims of detectable anisotropy with a diurnal pattern.

Contribution

It provides the most stringent constraints to date on the spatial anisotropy of G, challenging previous reports of such anisotropy.

Findings

Anisotropy of G is constrained to less than one part per billion.

Recent claims of G anisotropy with diurnal signature are ruled out.

Experimental data strongly support isotropy of G.

Abstract

We present constraints from various experimental data that limit any spatial anisotropy of the Gravitational constant to less than a part per billion or even smaller. This rules out with a wide margin the recently reported claim of a spatial anisotropy of G with a diurnal temporal signature.