APSIS - an Artificial Planetary System in Space to probe extra-dimensional gravity and MOND

TL;DR

This paper proposes an innovative space-based experiment called APSIS to test for extra-dimensional gravity effects and Modified Newtonian Dynamics (MOND) by measuring perihelion shifts of test masses in a controlled environment at L2.

Contribution

It introduces a novel space experiment concept to detect extra-dimensional effects and MOND, with specific design considerations for high-precision measurements.

Findings

Potential to detect a hidden fifth dimension at micron scale

Feasibility of measuring perihelion shifts with sub-arc-second accuracy in space

Design suggestions for a drag-free spacecraft environment

Abstract

A proposal is made to test Newton's inverse-square law using the perihelion shift of test masses (planets) in free fall within a spacecraft located at the Earth-Sun L2 point. Such an Artificial Planetary System In Space (APSIS) will operate in a drag-free environment with controlled experimental conditions and minimal interference from terrestrial sources of contamination. We demonstrate that such a space experiment can probe the presence of a "hidden" fifth dimension on the scale of a micron, if the perihelion shift of a "planet" can be measured to sub-arc-second accuracy. Some suggestions for spacecraft design are made.