NASA [Image] Artist Concept of SLS on Launchpad

Artist Concept of SLS on Launchpad

The Space Launch System, or SLS, will be designed to carry the Orion Multi-Purpose Crew Vehicle, as well as important cargo, equipment and science experiments to Earth's orbit and destinations beyond. Additionally, the SLS will serve as a back up for commercial and international partner transportation services to the International Space Station. Image Credit: NASA