Reference Book: Star Wars Saga Edition Legacy Era Campaign Guide
When you use the Move Object Force Power to hurl an object at one or more targets, it doesn't cease to take up space on impact. For particularly large objects, you as the Gamemaster have several options. First, you can describe the object as breaking up on impact, crumbling into several smaller objects and (At your discretion) creating Difficult Terrain without displacing anyone in the affected squares. For objects that are less likely to break up on impact, you can rule that the object now occupies a certain amount of space, and any creature occupying a space taken up by the object automatically moves to the nearest unoccupied space adjacent to the object (Without provoking Attacks of Opportunity).