Aradin Planetary System

We left Earth a long time ago.   It wasn't a mass exodus, really, but more of a slow trickle as the planet became steadily harder to scrape a living on. There might be some still getting by there, and a few colonies had started in the Sol System by the time the first ships left it, but at this point, its only real relevance is in the history books.   Captain Murphy Locke led the first colony ship beyond Sol and into the further reaches of the stars, and very few bothered to look back. Even fewer acknowledge that there's anything of significance to look back to. New stars were found, colonizing techniques were mastered, and humanity spread its reach.   The Aradin Planetary System consists of five colonized planets closely orbiting a small, relatively cool star. The planets -- Charuta, Aclara, Iabos, Praemia, and Nathos -- are still fairly new colonies, all things considered, but are functioning fairly well regardless.   Aradin only maintains contact with two other systems, Dynum and Zakon, and is otherwise secluded. They don't see it as a problem, but it has stunted their technological development a good deal. Each planet gets by with what they have, but they don't make any real impressive progress on anything deemed non-essential.   It has its fair share of problems, from resource shortages to huge wealth discrepancies between the planets.   There are, of course, plenty of potential problems outside their borders, too.