That answer merely confuses the man and he pauses in his work due to it. "So....it's purely arbitrary on whether one calls it a sun or a star?"

He's not even going to bother thinking about the 'planet' mention, he doesn't really understand how it's possible to actually be up in the stars and yet be capable of traveling to other worlds without using magic to do it. He's half of the mind that the people running this ship are using magic and perhaps whatever magic they're using to traverse the stars enables them to seamlessly slip from one world to another without any obvious telltales when they did it.