How does gravity affect the Milky Way?

Gravity plays a crucial role in the structure and dynamics of the Milky Way galaxy. It governs the motion of stars, gas, and dark matter, keeping them bound together in a spiral formation. The gravitational pull from the galaxy's central supermassive black hole influences the orbits of stars in the core, while the overall gravitational interactions between different components help shape the galaxy's spiral arms and maintain its stability over time. Additionally, gravity facilitates the formation of new stars by collapsing gas clouds within the galaxy.