In this letter, it is shown that dark energy is contributed by riccion (a particle concept for physical aspect of the Ricci scalar curvature) in a natural way without any input in the theory for it. It is in contrast to other models, where an idea for dark energy is introduced in the beginning of the theory. Interestingly, it is found that dark energy density, obtained here, decreases with the ...

A fundamental question in physics which has yet to be addressed experimentally is whether particles of antimatter, such as the antiproton or positron, obey the weak equivalence principle. ' An experiment that will test this principle directly for antiprotons is under development at present. Meanwhile, high-precision experimental results on the equality of the inertial masses of protons and anti...

The local galactic cluster, the Great attractor, embeds us in a dimensionless gravitational potential of about −3 × 10. In the solar system this potential is constant to about 1 part in 10. Consequently, planetary orbits, which are determined by the gradient in the gravitational potential, remain unaffected. However, this is not so for the recently introduced flavor-oscillation clocks where the...

We calculate the Newtonian gravitational potential and field of a cubic, homogeneous asteroid and we apply it to the orbit of possible satellites. Large astronomical objects such as stars or planets, naturally tend to form spherical shapes due to the dominance of the gravitational forces, but as a thought experiment, we consider the properties of a planet in the form of a perfect cube. We inves...

The theory of gravity without free gravitational fields is considered. It is assumed that gravitational radiation is some hypothetical matter fields. Gravitational emission is a process of the decay of proton into hypothetical matter fields at the Planck scale. In the Einstein theory of gravity [1] with the Lagrangian L = − 1 16πG √ gR, (1) gravitational field is defined by the components of th...

A corollary of general relativity that the velocity of light is anisotropic in a gravitational field has received little attention so far. It is shown that this anisotropy can be directly probed by an experiment initially proposed for testing the one-way velocity of light. The proposed experiment constitutes another test of general relativity since the anisotropy in the propagation of light in ...