On the origin of inertia
Abstract
As Einstein has pointed out, general relativity does not account satisfactorily for the inertial properties of matter, so that an adequate theory of inertia is still lacking. This paper describes a theory of gravitation which ascribes inertia to an inductive effect of distant matter. In the restframe of any body the gravitational field of the universe as a whole cancels the gravitational field of local matter, so that in this frame the body is "free Thus in this theory inertial effects arise from the gravitational field of a moving universe. For simplicity, gravitational effects are calculated in flat spacetime by means of Maxwelltype field equations, although a complete theory of inertia requires more complicated equations. This theory differs from general relativity principally in the following respects: (i) It enables the amount of matter in the universe to be estimated from a knowledge of the gravitational constant. (ii) The principle of equivalence is a consequence of the theory, not an initial axiom. (iii) It implies that gravitation must be attractive. The present theory is intended only as a model. A more complete, but necessarily more complicated theory will be described in another paper.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 1953
 DOI:
 10.1093/mnras/113.1.34
 Bibcode:
 1953MNRAS.113...34S