The denser region of the galaxy where stars are closer together is known as the galactic core or nucleus. In our Milky Way galaxy, the core contains a high concentration of stars, gas, and dust within a relatively small volume, resulting in a crowded environment. This area is also believed to host a supermassive black hole, known as Sagittarius A*, which influences the motion of nearby stars. The core's brightness and density make it an intriguing region for astronomers to study stellar dynamics and the processes governing galaxy formation and evolution, offering insights into the universe's history.