NASA's Lunar Gateway: The Future of Moon Orbiting Space Station.

NASA, along with international and private partners, is planning to build a small space station called Lunar Gateway, which will support missions at and around the Moon and provide a unique platform for conducting science. The station will be located in a near-rectilinear halo orbit and will consist of a Power and Propulsion Element (PPE) and a Habitation and Logistics Outpost (HALO). The first five elements will weigh 40 metric tons and will serve as the foundation upon which a larger station will be built over time. Gateway could also serve as the staging point for NASA’s proposed Deep Space Transport, from which a mission to Mars could be launched.