Wide binary stars as direct probes of the nature of gravity at low acceleration weaker than about 1 nanometer per second squared have been hotly debated. The nature of gravity at such low acceleration is of utmost importance because the concept of dark matter, the gravitational dynamics of astrophysical systems, fundamental theories of physics and cosmology are all inextricably intertwined with it.
New measurements of gravitational anomaly at low acceleration favor modified gravity, researcher claims
