I’ve been reading various things on the internet about how Modified Newtonian Dynamics attempts to solve (or just model?) the “missing mass” problem in galaxies. It sounds more reasonable to me than hypothesizing conveniently undetectable dark matter. But I am wondering why they are using what seems like more complicated expressions than necessary. Isn’t it a simple curve fit for the universal gravitation “constant”? I am assuming there must be good reasons why it is not that “simple”. Any help in understanding this is appreciated.