ok so with this solar system generator is there a way to rename the planets once we generate the system and before we export it ?"
Not with the SSG itself. I haven't done it myself but you'll probably want to export the scenario then go in and manually change the name of the playfield folders and the names in the sectors.yaml file. Maybe somebody else will have more info.
Actually i found a way to do it with SSG , well in a way just change the names in the folder of RandomPrefab theres names folders in there i took them out and replaced with custom names i made so my planets will have names i have chosen not what the DEV's chose . Worked great .