Hum... I assume you want to know if more stellar systems are coming in galacticraft ? Sadly, I don't think it is an actual project (for now). So far, we can land on the moon, Mars and Venus, as well as an Earth Space Station. The developpement of planets seems rather complicated, and thus more planetary systems may not come before the Solar System is done (I am not a developper, I might be wrong tought). If you want, you have some addons, and some have done an amazing job ! For example, there is Extra Planets. With a little bit of searching, you will find it. I hope I helped you, have a nice day !