Not sure if this is even within the realm of possibilities but it'd be cool if there were space stations in later tier sectors, they'd act just like planets in the sense of accessing them via the galactic map and would be found either in solar systems by them selves or next to planets. Just a thought!
I remember hearing that Space Stations were something the devs were working on... but I don't know what they are doing with them and how they would be implemented. They could function alot like the Ship currently does, or maybe function a lot like moons by a planet like you want. They could be buildable... or they could not... but they would be an excellent addition and can't wait to see what Chucklefish does.
Yep, I definitely like that idea. You could even have them loop around like walking all the way around a planet and have it makes sense because you'd just be walking on a round spinning station. Could even have trade hubs with lots of shops or rare building components for making that perfect base. I like it.