It's not the first time something like this has been proposed... and found fault with. https://inspirehep.net/literature/690135 https://inspirehep.net/literatu

It's not the first time something like this has been proposed... and found fault with. https://inspirehep.net/literature/690135 https://inspirehep.net/literature/690135 > Recently a new model of galactic gravitational field, based on ordinary General Relativity, has been proposed by Cooperstock and Tieu in which no exotic dark matter is needed to fit the observed rotation curve to a reasonable ordinary matter distribution. We argue that in this model the gravitational field is generated not only by the galaxy matter, but by a thin, singular disk as well. The model should therefore be considered unphysical.