It sounds like you're looking for a term to describe a star that is very distant from our solar system. The word you might be looking for is "extraterrestrial" or "interstellar." A more specific term could be "extraplanetary," which refers to anything beyond or outside of the planets in our solar system. If you're seeking a more colloquial term, "far-flung" or "remote" could also convey the idea of being very far away.
If you have a specific context in mind, please provide more details!