I'm taking a course in general relativity, it's a beautiful theory and I personally have no reason to doubt it's validity. However, I also recently stumbled upon and alternative theory of gravitation which was worked out by Oleg Jefimenko and is published in the following book:(adsbygoogle = window.adsbygoogle || []).push({});

https://www.amazon.com/Gravitation-...-Conclusion/dp/091740615X/ref=ntt_at_ep_dpt_4

I'm off campus and don't have access to journals for the weekend, but I'm wondering if anyone knows anything about this work? The following excerpt from the review has me intensely curious about the idea:

It seems what Jefimenko has done is to make Newtonian gravity consistent with the principle of causality, and in the process introduced a "new" (not new in general relativity, but I believe new in the context of Newtonian gravity) gravimagnetic field. The generalized theory of gravitation is fully compatible with the laws of conservation of energy and momentum. A very important result of this compatibility is the definitive explanation of the process of conversion of gravitational field energy into the kinetic energy of bodies moving under the action of gravitational fields.

The generalized theory of gravitation predicts the existence of gravitation-cogravitational waves and explains how such waves can be generated.

The generalized theory of gravitation also indicates the existence of antigravitational (repulsive) fields and mass formations. A cosmological consequence of such fields and mass formations is a periodic expansion and contraction of the Universe. Another consequence is that the actual mass of the Universe may be much larger than the mass revealed by an analysis of gravitational attraction in the galaxies.

It is natural to compare the various consequences of the generalized theory of gravitation with the consequences of the general relativity theory. In this regard the following three remarks should be made.

First, there are no observable gravitational effects revealed by the general relativity theory that do not have their counterparts in the generalized theory of gravitation.

Second, the generalized theory of gravitation describes a vastly larger number of gravitational effects than those described by the general relativity theory.

Third, numerical values for gravitational effects predicted by the general relativity theory are usually different from the corresponding values predicted by the generalized theory of gravitation; the difference is almost always a consequence of greater complexity and depth of gravitational interactions revealed by the generalized theory of gravitation.

Although this book presents the results of original research, it is written in the style of a textbook and contains numerous illustrative examples demonstrating various applications of the generalized Newtonian theory of gravitation developed in the book.

I'm considering buying this book and reading it for myself, but I'd like to find out a little more first.

For a start, I'd be very very curious if his theory predicts gravitational lensing and gravitational time dilation - both well observed phenomena which it seems any theory of gravity should contain, and which seem fundamental to the idea of a curved space time, I think it'd be a very big deal if you could create these effects without invoking a metric theory.

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# Generalization of Netwonian gravity - Jefimenko's theory of gravitation

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