Extended theories of gravity

Rather than trying to discover correct calculations for the matter side of the Einstein field equations (which include inflation, dark energy, dark matter, large-scale structure, and possibly quantum gravity), it is instead proposed to change the gravitational side of the equation.

), first proposed in 2010 by the Mexican astronomers Xavier Hernández Doring, Sergio Mendoza Ramos et al., researchers at the Astronomy Institute, at the National Autonomous University of Mexico.

[3][4] This theory is in accordance with observations of kinematics of the solar system, extended binary stars,[5] and all types of galaxies and galactic groups and clouds.

[7] There is some evidence that it could also explain the dark energy phenomena[8] and give a solution to the initial conditions problem.

This approach to solve the dark matter problem takes into account the Tully–Fisher relation as an empirical law that applies always at scales larger than the Milgrom radius.