Astronomical observations reveal a major deficiency in our understanding of physics—the
detectable mass is insufficient to explain the observed motions in a huge variety of systems …

We test Milgromian dynamics (MOND) using wide binary stars (WBs) with separations of 2–
30 kAU. Locally, the WB orbital velocity in MOND should exceed the Newtonian prediction …

Aims. Observational data show that the observed luminous matter is not sufficient to explain
several features of the present universe, from gravitational structure formation to the …

We considered a vacuum polarization inside a galaxy in the eikonal approximation and
found that two possible types of polarization exist. The first type is described by the equation …

The gravitational dipole theory of Hadjukovic (2010) is based on the hypothesis that
antimatter has a negative gravitational mass and thus falls upwards on the Earth …

By combining general relativity and CPT symmetry, the theory of CPT gravity predicts
gravitational repulsion between matter and CPT‐transformed matter, ie, antimatter inhabiting …

It will be shown that a gravitational theory based on there being an additional contribution to
the gravitational field from mass dipoles leads to the same field equation that arises from the …

Using the two-component superfluid model of Winterberg for space, two models for the
susceptibility of the cosmic vacuum as a function of the cosmic scale parameter, a, are …

We propose a model for gravity based on the gravitational polarization of space. With this
model, we can relate the density parameters within the Friedmann model, and show that …

Assuming a Winterberg model for space where the vacuum consists of a very stiff two
component superfluid made up of positive and negative mass planckions, theory is the …