The Orion Multi-Purpose Crew Vehicle (Orion MPCV) is a class of partially reusable spacecraft used in NASA’s human spaceflight programs. Consisting two components – a Crew Module (CM) manufactured by Lockheed Martin, and a European Service Module (ESM) manufactured by Airbus Defence and Space – the spacecraft are designed to support crewed exploration beyond low Earth orbit. Orion is equipped with solar power, an automated docking system, and glass cockpit interfaces modeled after those used in the Boeing 787 Dreamliner, and can support a crew of six up to 21 days undocked and up to six months docked. A single AJ10 engine provides the spacecraft’s primary propulsion, while eight R-4D-11 engines and six pods of custom reaction control system engines developed by Airbus provide the spacecraft’s secondary propulsion. Although compatible with other launch vehicles, Orion is primarily designed to launch atop a Space Launch System (SLS) rocket, with a tower launch escape system.