The Branan left their homeworld less than a century after the Albion disappeared. Technically, they’d left numerous times in the years before, using the Albion shuttles to place satellites in orbit, and do all of the other things a young spacefaring race does. But those were tiny ships that could take only a few people and small amounts of cargo into orbit. A few brave souls floated through the system on exploration trips that took years, far out of reach of any help if there was an emergency, and beamed their findings back home. But most of their time was spent no further out than the outer orbitals. Then the Branan began sending larger boosters into orbit to assemble great interplanetary spacecraft. Albion shuttles controlled the first of them, but the Branan built their own complete spacecraft in time. And that was when they began their true colonization of their home star system.