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 …

Dwarf galaxies are ideal laboratories to test dark matter models and alternative theories
because their dynamical mass (from observed kinematics) largely outweighs their baryonic …

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 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 …

Cosmological models predict that galaxies forming in the early Universe experience a
chaotic phase of gas accretion and star formation, followed by gas ejection due to feedback …

Due to their low surface brightness, dwarf galaxies are particularly susceptible to tidal forces.
The expected degree of disturbance depends on the assumed gravity law and whether they …

The Gaia eDR3 catalogue has recently been used to study statistically the internal
kinematics of wide binary populations using relative velocities of the two component stars, Δ …

A bstract We show that primordial black holes—in the observationally allowed mass window
with f PBH= 1—formed from late nucleating patches in a first order phase transition imply …

We study the dynamics of cold molecular gas in two main-sequence galaxies at cosmic
noon (zC-488879 at z≃ 1.47 and zC-400569 at z≃ 2.24) using new high-resolution ALMA …

The exploration of the low acceleration a< a 0 regime, where a 0= 1.2× 10− 10 ms− 2 is the
acceleration scale of MOND around which gravitational anomalies at galactic scale appear …