NASA proposed several concept moonbases for achieving a permanent presence of humans on the Moon since the late 1950s. Research and exploration of the Moon has been a large focus of the organization since the Apollo program. NASA's peak budget was in 1964-1965, when it comprised 4% of all federal spending in service of the Apollo Moon landing project. Though lunar landings ever since the conclusion of the Apollo program in 1972 have ceased, interest in establishing a permanent habitation on the lunar surface or beyond low Earth orbit has remained steady. Recently, renewed interest in lunar landing has led to increased funding and project planning. NASA requested an increase in the 2020 budget of $1.6 billion, in order to make another crewed mission to the Moon under the Artemis program by 2025, followed by a sustained presence on the Moon by 2028. A crew was selected for the planned crewed mission, Artemis II, in April 2023.
The retirement of NASA's Space Shuttle fleet took place from March to July 2011. Discovery was the first of the three active Space Shuttles to be retired, completing its final mission on March 9, 2011; Endeavour did so on June 1. The final shuttle mission was completed with the landing of Atlantis on July 21, 2011, closing the 30-year Space Shuttle program.
Orion is a partially reusable crewed spacecraft used in NASA's Artemis program. The spacecraft consists of a Crew Module (CM) space capsule designed by Lockheed Martin and the European Service Module (ESM) manufactured by Airbus Defence and Space. Capable of supporting a crew of four beyond low Earth orbit, Orion can last up to 21 days undocked and up to six months docked. It is equipped with solar panels, an automated docking system, and glass cockpit interfaces modeled after those used in the Boeing 787 Dreamliner. 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. Orion is intended to launch atop a Space Launch System (SLS) rocket, with a tower launch escape system.
The European System Providing Refueling Infrastructure and Telecommunications (ESPRIT) is a planned module of the Lunar Gateway. It will provide refueling through additional xenon and hydrazine capacity for use in the Power and Propulsion Element's ion engines and hydrazine thrusters. It will also provide additional communications equipment, a habitation area, and storage. It will have a launch mass of approximately 10,000 kg (22,000 lb), a length of 6.4 m (21 ft), and a diameter of 4.6 m (15 ft). ESA awarded two parallel design studies for ESPRIT, one mostly led by Airbus in partnership with Comex and OHB and one led by Thales Alenia Space. The construction of the module was approved in November 2019. On 14 October 2020, Thales Alenia Space announced that they had been selected by ESA to build the ESPRIT module.
Artemis 2 is a scheduled mission of the NASA-led Artemis program. It will use the second launch of the Space Launch System (SLS) and include the first crewed mission of the Orion spacecraft. The mission is scheduled for no earlier than September 2025. Four astronauts will perform a flyby of the Moon and return to Earth, becoming the first crew to travel beyond low Earth orbit since Apollo 17 in 1972. Artemis 2 will be the first crewed launch from Launch Complex 39B of the Kennedy Space Center since STS-116 in 2006.
Artemis 3 is planned to be the first crewed Moon landing mission of the Artemis program and the first crewed flight of the Starship HLS lander. Artemis 3 is planned to be the second crewed Artemis mission and the first American crewed lunar landing since Apollo 17 in December 1972. In December 2023, the Government Accountability Office reported that the mission is not likely to occur before 2027; as of January 2024, NASA officially expects Artemis 3 to launch no earlier than September 2026.
The Lunar Gateway, or simply Gateway, is a space station which Artemis program participants plan to assemble in an orbit near the Moon. The Gateway is intended to serve as a communication hub, science laboratory, and habitation module for astronauts. It is a multinational collaborative project: participants include NASA, the European Space Agency (ESA), the Japan Aerospace Exploration Agency (JAXA), the Canadian Space Agency (CSA) and the Mohammed Bin Rashid Space Centre (MBRSC). The Gateway is planned to be the first space station beyond low Earth orbit.
Blue Moon is a family of lunar landers and their associated infrastructure, intended to carry humans and cargo to the Moon, currently under development by a consortium led by Blue Origin and including Lockheed Martin, Draper, Boeing, Astrobotic, and Honeybee Robotics. Two versions of Blue Moon are under development: a robotic lander planned to land on the Moon in 2024, and a larger human lander planned to land a crew of four astronauts on the lunar surface for the NASA Artemis V mission in 2029.
The Lockheed Martin Lunar Lander is a series of design concepts by Lockheed Martin for a crewed lunar lander.
The Artemis program is a Moon exploration program that is led by the United States' NASA and was formally established in 2017 via Space Policy Directive 1. The Artemis program is intended to reestablish a human presence on the Moon for the first time since Apollo 17 in 1972. The program's stated long-term goal is to establish a permanent base on the Moon to facilitate human missions to Mars.
Artemis 4 is a planned mission of the NASA-led Artemis program. The mission will include the fourth use of a Space Launch System (SLS) launch vehicle, will send an Orion spacecraft with four astronauts to the Lunar Gateway space station, install a new module on the Gateway, and conduct the second lunar landing of the Artemis program.
The Gateway Logistics Services will be a series of uncrewed spaceflights to the Lunar Gateway space station, with the purpose of providing logistical services to the Gateway. Overseen by NASA's Gateway Logistics Element, the flights will be operated by commercial providers, contracted by the agency in support of crewed expeditions to the Gateway made under the Artemis program. As of March 2023, SpaceX is the only company contracted to provide the services.
Starship HLS is a lunar lander variant of the Starship spacecraft that is slated to transfer astronauts from a lunar orbit to the surface of the Moon and back. It is being designed and built by SpaceX under the Human Landing System contract to NASA as a critical element of NASA's Artemis program to land a crew on the Moon.
The Integrated Lander Vehicle (ILV) was a human spaceflight lunar lander design concept proposed in 2020/21 for the NASA Human Landing System (HLS) component of the Artemis program. Blue Origin was the lead contractor for the multi-element lunar lander that was to include major components from several large US government space contractors including Lockheed Martin, Northrop Grumman, and Draper Laboratory.
The Dynetics Autonomous Logistics Platform for All-Moon Cargo Access (ALPACA)—also known as Dynetics HLS—(ILV) is a human spaceflight lunar lander design concept proposed in 2020/21 for the NASA Human Landing System (HLS) component of the Artemis program. Dynetics was the lead contractor for the ALPACA lander—other contractors included Sierra Nevada Corporation—for NASA's Artemis Program.
The Human Landing System (HLS) is the spacecraft in NASA's Artemis program that is expected to land humans on the Moon. It is being designed to convey astronauts from the Lunar Gateway space station in lunar orbit to the lunar surface, sustain them there, and then return them to the Gateway station.
The International Habitation Module, International Habitat or I-HAB is designed as a habitat module of the Lunar Gateway station, to be built by the European Space Agency (ESA) in collaboration with the Japan Aerospace Exploration Agency, or JAXA. The I-HAB will have a maximum launch mass of 10,000 kg (22,000 lb) and provide a habitable volume of 10 m3 (350 cu ft).
