For instance, NASA will be using the Space Launch System (SLS) and Orion spacecraft to send astronauts back to the Moon starting in 2024. The core of the Gateway - the Power and Propulsion Element (PPE) and the Habitation and Logistics Outpost (HALO) - will also be launched by 2024 using a SpaceX Falcon Heavy rocket.
Paired with a reusable lunar lander, this orbital habitat will allow for long-duration missions to the lunar surface. Between 2024 and 2028, NASA also intends to add the International Habitation Module (I-HAB), the European System Providing Refueling, Infrastructure and Telecommunications (ESPRIT), and possibly more modules to the Gateway.