Ultra-light dark matter is a class of dark matter models (DM), where DM is composed by
bosons with masses ranging from 10^-24\, eV< m< eV 10-24 eV< m< eV. These models …

Although dark matter is a central element of modern cosmology, the history of how it became
accepted as part of the dominant paradigm is often ignored or condensed into an anecdotal …

A gravitational anomaly is found at weak gravitational acceleration g N≲ 10− 9 ms− 2 from
analyses of the dynamics of wide binary stars selected from the Gaia DR3 database that …

We propose a relativistic gravitational theory leading to modified Newtonian dynamics, a
paradigm that explains the observed universal galactic acceleration scale and related …

A century ago, Einstein formulated his elegant and elaborate theory of General Relativity,
which has so far withstood a multitude of empirical tests with remarkable success …

Recent theoretical progress indicates that spacetime and gravity emerge together from the
entanglement structure of an underlying microscopic theory. These ideas are best …

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 …

The recent observation of the shadow of the supermassive black hole M87*, located at the
center of the M87 galaxy, by the Event Horizon Telescope Collaboration has opened up a …

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 …

The strong equivalence principle (SEP) distinguishes general relativity (GR) from other
viable theories of gravity. The SEP demands that the internal dynamics of a self-gravitating …