High Quality Content by WIKIPEDIA articles! The Shuttle-Derived Launch Vehicle, or simply Shuttle-Derived Vehicle (SDV), is a term describing one of a wide array of concepts that have been developed for creating space launch vehicles from the components, technology and/or infrastructure of the Space Shuttle program. In 2005, NASA decided to develop the Ares I and Ares V launch vehicles, based in part on highly modified Shuttle components to replace the Space Shuttle and enable exploration of the Moon and Mars. In early 2007, the agency confirmed that it was formally studying a third such vehicle, the Ares IV.