The gravitational force of the Sun, based on observations, is derived as the product of the acceleration times the area of a circle with radius equal to the semimajor axis of revolution. This quantity is constant for all planets, asteroids, and artificial satellites; it is independent of the mass of the attracted body.

# Gravitational Constant

In their article, “Experimental Evidence that the Gravitational Constant Varies with Orientation” (Infinite Energy #55), Mikhail Gershteyn et al. report on their observation of G anisotropy1. They have detected a change of about 0.054% in the value of G occurring every 23.89 hours corresponding to about the period of one sidereal day.