In the vast universe, galaxies rotate in ways that don’t make sense if only visible matter is considered. For almost a ...

Moreover, at low energies, their modified equations behaved just like Einstein’s general relativity, suggesting that gravity ...

There are various methods to measure acceleration due to gravity. At Higher level all rely on one of the equations of motion. The measurements required will depend on the equation used.

His idea: gravity can exist without any mass at all. The study explores a different solution to the same equations that normally describe gravity—both in Newtonian theory and in general relativity.