So, i downloaded the latest version of your mod and tried to give it another go. Previously, I had another planet mod installed so i thought maybe it was causing a conflict. Deleting it didn't help.
However the other planet mod causes no problems when i remove your mod.
When your mod is installed, and i try to leave Kerbal sphere of influence, say for example to try to get to Duna, this is what happens https://imgur.com/BbOS4Xd
Also a couple of more minor problems you might want to correct for your next update
1- I don't know if its a bug or a feature, but the orbit colour of Lumia is black. This makes it very hard to see.
2- On the Observatory descriptions, all the moons have the same information descriptions as Ariel.