Stars are not limited to galaxies; they can exist in intergalactic space, although most are found within galaxies. Stars that are found outside galaxies likely originated from them and were ejected due to events like galaxy collisions or interactions. These ejections can occur during mergers or through three-body interactions in stable galaxies. Additionally, there are even instances of planets existing outside of any gravitational influence from stars. The existence of hypervelocity stars supports the idea that stars can be found beyond the confines of galaxies.