... which are measured andmapped by geophysicists, e.g., in mineral prospecting. As usual, for didacticalreasons we distinguish between the inertial mass mtand the gravitationalmass ms, althoughms= ... the earth had the form of an exact sphere, and if the mass distributionwere exactly spherical, then G1and G2would vanish, and G3≡−g.Thedeviations correspond to gravitational anomalies, ... totality of all stars. But as mentionedabove it was only Einstein, who, some years later, cut the “Gordian knot” bystating that only local inertial frames exist, thus solving in an elegant wayan...