The Sun's position in the universe is not due to any specific reason or deliberate placement. It is situated within the Milky Way galaxy, which is just one of billions of galaxies in the universe. The distribution and spacing of stars and galaxies in the universe are determined by various astrophysical processes and gravitational interactions over billions of years.
The Sun is located in the outer regions of the Milky Way galaxy, specifically in a spiral arm called the Orion Arm or Local Spur. This location is relatively far from the galactic center, where a supermassive black hole resides, as well as from the dense central regions of the galaxy.
The spacing between stars in the universe is vast, primarily due to the vast scale of the cosmos. Stars are separated by vast distances, typically measured in light-years, which is the distance light travels in one year. The reason for such vast distances is that stars form within molecular clouds and are scattered throughout the galaxy. Gravitational interactions between stars, along with other factors, affect their distribution and spacing.
It's important to note that the Sun's position in the Milky Way galaxy is not particularly unique or special. There are billions of other stars in similar positions throughout the galaxy, and each star's location is a result of the complex dynamics and evolution of galaxies over cosmic timescales.