Fitting Galaxy Rotation Curves Without Dark Matter

The notion is presented that fitting galaxy rotation curves is possible without the invocation of dark matter. Equations of motion similar to those used to describe the internal motions of terrestrial weather systems are applied to the rotation curves of galaxies. However, due to the four-dimensional nature of the equations, additional terms arise. One of these additional terms is particularly useful in matching the rotation curves of galaxies. The extra term presumably describes internal properties of the central galactic black hole. It also determines, in part, the galactic rotation curve, just as the motion of winds in a terrestrial weather system are determined, in part, by the rotation of the Earth.