You could get all three in the same sector in earlier Versions... not sure which ones but I remember doing it. Back when you could ringworld or sphereworld a star and then make a new star. Just make it on top of the sphereworld/ringworld and then build a new ringworld/sphere world... etc until you get bored of it.
I never actually made three on top of each other.... just two.
Then a star so all that solar based stuff still worked. Like planet creation, though since I don't see the planets orbiting anything wouldn't it be possible to make a planet without a star?