It is shown that the slowing down of the rate of time referencing to the inertial timeleads in the field theory of gravitation to arising of repulsive forces which remove the cos-mological singularity in the evolution of a homogeneous and isotropic universe and stopthe collapse of large masses. It is shown that the slowing down of the rate of time referencing to the inertial tim...

Since Einstein’s 1916 development of gravitation it is considered a necessity that a theoretically consistent and experimentally accurate theory of gravitation requires the intrinsic curvature of Riemannian geometry [1, 2]: concomitantly the ontology of space and time becomes entangled with gravitation, and ‘reality’, as the observer invariant present, is obliterated. Standard geometrodynamic r...

Bianchi type-VI0 space time with strange quark matter attached to string cloud in Nordtvedt [1] general scalar tensor theory of gravitation with the help of a special case proposed by Schwinger [2] is obtained. The field equations have been solved by using the anisotropy feature of the universe in the Bianchi type-VI0 space time. Some important features of the model, thus obtained, have been di...

Modern experiment has shown that bulk matter exhibits quantum structure and that this structure is electromagnetic in character. Therefore, we treat the electromagnetic field as the source of gravitation. In this way, the theory of gravitation becomes consistent with the quantum theory of matter, which holds that electric charge (or ‘generalized charge’) is the most fundamental attribute of mat...

Article history: Received 9 June 2005 Received in revised form 13 September 2008 Accepted 3 November 2008

The confrontation between general relativity (and its theoretically most plausible deviations) and experimental or observational results is summarized. Some discussion is devoted to the various methodologies used in confronting theory and experiment. Both weak-field (solar system) and strong-field (binary pulsar) tests are discussed in detail. A special discussion is devoted to the cosmology of...

We propose a Lorentz-covariant theory of gravity, and explain its theoretical origins in the problem of time in Newtonian physics. In this retarded gravitation theory (RGT), the gravitational force depends upon both retarded position and velocity, and the equations of motion are time-asymmetric retarded functional differential equations. We explicitly solve these equations, under simplifying as...

The confrontation between Einstein’s gravitation theory and experimental results, notably binary pulsar data, is summarized and its significance discussed. Experiment and theory agree at the 10−3 level. All the basic structures of Einstein’s theory (coupling of gravity to matter; propagation and self-interaction of the gravitational field, including in strong-field conditions) have been verifie...

The XXVI Encontro Nacional de Fı́sica de Partı́culas e Campos (ENFPC: Brazilian National Meeting on Particles and Fields) took place in São Lourenço, MG, Brazil, in October 2005. I was invited to deliver the summary talk on the area of gravitation and cosmology, in which I took the opportunity to briefly present a historic sketch of the ideas related to relativity, gravitation and cosmology in ge...