👉 The galaxy fluid is a theoretical model used to describe the large-scale structure and dynamics of galaxies, particularly in the context of dark matter and baryonic matter interactions. It posits that galaxies are embedded within a vast, diffuse halo of dark matter, which acts as a gravitational scaffold. This dark matter fluid, characterized by its high density and slow dynamics, influences the distribution and motion of visible baryonic matter (stars and gas) within galaxies. The galaxy fluid model helps explain phenomena such as the rotation curves of spiral galaxies, where stars at the outer edges orbit faster than expected based on visible mass alone. It also accounts for the formation and evolution of galactic structures, including bars, spiral arms, and mergers, by simulating the gravitational interactions between dark matter and baryonic components over cosmic timescales.
