The luminosity of stars and galaxies is relativistic luminosity because it is affected by the motion and gravity of stars and galaxies. It is called positive relativistic luminosity because it is related to the positive relativistic mass assumed by the inverse relativity model. The difference between the positive relativistic mass in positive space-time and the total relativistic mass that bends the fabric of space-time, according to the inverse relativity model is the negative relativistic mass or mass in negative space-time, the properties and distribution of negative relativistic mass in the universe are consistent with the properties and distribution of dark matter, as it does not emit radiation, does not interact with light, does not consist of a specific elementary particle, does not interact with electric and magnetic fields, and interacts only with gravity, as it appears only on the cosmic level in Stars, galaxies and galaxy clusters