The parallel dimension used by ships to facilitate expeditious interstellar travel.
Moving too close to a source of high gravity can remove a ship from hyperspace. This can occur when faulty calculations move the ship too near a star or large planet. This mechanism is exploited by the Imperial Interdictor cruiser, whose Gravity well projectors can be used to pull ships out of hyperspace for an ambush, or to prevent ships from fleeing the battlefield. It is also exploited by pirates, who have been known to haul large asteroids into such a position as to bring a ship out of hyperspace in order to ambush and board it.