| While the great majority of stars are in galaxies, there are many straying through intergalactic space. With the considerable amount of information we have on star formation, the most likely reason for these is galactic collisions. When two galaxies pass through one another, many stars pass close to each other. These close passes can result in one or both stars being ejected from their region of their galaxy with great speed. Smaller stars and those which are already pretty far from the centers of gravity for each galaxy, can reach escape velocity from the large aggregate. They can spend a very long time in between galaxies after that. |