I keep trying to get to other planets, but the farthest planet I can go beyond the Overworld/Earth is Ceres, everything else is labeled “Tier ?” And I cant get to them at all, I think the Tier 10 electric rocket will get me there but I can’t get it to work, though that’s a side note, can someone just explain to me why there are Tier ?’s, I’m pretty sure that means they’re just works in progress but it’s getting me rather annoyed to see these planets and not be able to explore