Not to seem imposing or anything, but isn't a continent a bit much for a Baron? Barons are low nobles. It would seem more fitting for Barons to rule over country-sized regions within continents, and for Counts to rule continents, while Dukes rule planets/moons. Obviously not up to me, though.
Hey, sorry I missed this in my last response. I appreciate where you're coming from, pepperm1nts, but I'm not going to be too particular with titles, since even in fuedal europe the titles often didnt match actual power, wealth or holding size of a particular noble. The idea is that the Kingdom is slightly chaotic and decentralized, and so I feel like alot of this would be nonstandardized across the systems. On one planet a Baron might rule a small area or city, on others he might rule a much more significant amt of territory depending on local customs and circumstances.
Also- side note, feel free to make up your own fun space noble titles. In the setting section, I have a xenos world administered by an Overbaron (w/e that is :) ), so feel free to improvise.