Describes those aerospace craft with the capability to alter the sweep of the main wings into the optimal configuration for the speed at which the craft is flying. Swept wing configurations are good for high speed flight while unswept wings are better for flying at low speeds. While relaxed stability provides a better, more efficient way of achieving the same advantages of variable-sweep wing systems, variable geometry wings are integral to the transformation systems of almost all variable fighters and provide advantages in space flight using vernier thrusters mounted within the main wings.