A reusable launch system is a space transportation system that is designed to allow multiple launches of payloads from the same vehicle. This contrasts with expendable launch systems, which are only designed for a single use and then are discarded.
Some of the emerging trends in reusable launch systems include the development of reusable rockets, the use of 3D printing technology to create reusable launch vehicles, and the use of electric propulsion systems to power reusable launch vehicles.