NASA’s Artemis program represents the U.S. campaign to land astronauts on the Moon for the first time since Apollo and to build toward a sustained human presence there. The agency has framed the effort as central to maintaining U.S. leadership in space amid increasing competition from China. The program’s evolution has been marked by programmatic shifts, schedule revisions and the integration of commercial partners.
2017-2018: Program revived
During President Donald Trump’s first administration, NASA redirected human spaceflight priorities back toward the Moon after a period of emphasis on Mars. The renewed lunar focus was organized around two primary systems: the Space Launch System, or SLS, heavy-lift rocket, and the Orion crew capsule. Both pieces of hardware trace their conceptual origins to the earlier Constellation program, which had been canceled. Boeing was named the prime contractor for the SLS core stage, Northrop Grumman was assigned production of the solid-fuel boosters and Lockheed Martin was tasked with building the Orion spacecraft.
2019: Accelerated timeline set
In 2019, the White House established an ambitious target date for a crewed lunar landing in 2024. NASA described an initial three-mission sequence under what would later be named Artemis: Artemis I as an uncrewed test flight, Artemis II as a crewed lunar flyby and Artemis III as a crewed landing on the lunar surface.
2020-2021: Delays mount; moon lander selected
Technical challenges, rising costs and disruptions linked to the COVID-19 pandemic contributed to schedule slippages across the program, affecting the SLS rocket, the Orion capsule and launch infrastructure at Kennedy Space Center. During this period, NASA selected SpaceX’s Starship to serve as the program’s first lunar lander. The agency maintained the 2024 landing objective initially but acknowledged that the schedule could be infeasible given the ongoing issues.
2022: Artemis I flies
In November 2022, NASA completed Artemis I, launching an uncrewed Orion spacecraft on a roughly 25-day mission that carried the vehicle around the Moon and back to Earth. The flight exercised deep-space navigation and communications and put Orion’s heat shield through a high-speed reentry test. NASA characterized those validations as critical prerequisites before putting astronauts on board for future flights.
2023-2024: Program recalibrated
After months of legal disagreements about NASA’s initial decision to select a single commercial lander, Jeff Bezos’ Blue Origin was later designated as the agency’s second lunar lander provider in 2023. Under the Biden administration, NASA reset the Artemis timeline and moved the first crewed lunar landing out to 2027. Throughout this period, the agency continued to defend the program amid fiscal scrutiny while emphasizing the strategic importance of the effort in the face of China’s own lunar ambitions.
2024: Artemis II crew named
NASA announced the four astronauts assigned to Artemis II: Reid Wiseman, Victor Glover, Christina Koch and Canadian astronaut Jeremy Hansen. That mission will be the first crewed voyage toward the Moon since Apollo 17 in 1972, and it is planned as a flyby that will not include a lunar surface landing.
2026: Program overhauled under new leadership
Following a change in NASA leadership, Administrator Jared Isaacman initiated a broad restructuring of Artemis. Plans for the Lunar Gateway, a proposed space station to orbit the Moon, were canceled and components intended for that station were redirected to support construction of a permanent base on the lunar surface. Isaacman also added an extra crewed mission before attempting a landing, arguing that an additional flight would build operational experience for crews and ground teams in deep space before initiating sustained surface operations.
April 2026: Artemis II mission around the Moon
In April 2026, NASA launched Artemis II, a roughly 10-day crewed mission that sent four astronauts on a flyby of the Moon. The mission did not include a surface landing but took the crew farther from Earth than any human flight since the Apollo era. NASA described the mission’s objectives as testing Orion’s life-support systems, navigation, communications and heat shield performance in deep space, capabilities the agency deems essential before attempting a lunar landing.
Later this decade: Moon landing planned
Artemis is designed to return astronauts to the lunar surface using commercially developed landers, a capability NASA considers a necessary precursor to future missions to Mars. SpaceX and Blue Origin are competing to deliver the lunar lander hardware under NASA’s strategy of engaging private companies to supply critical deep-space systems. NASA has said the first crew to walk on the Moon under Artemis will use whichever commercial lander completes development first.
This timeline captures the programmatic decisions and mission milestones that have shaped Artemis from its revival through crewed test flights and a redesigned architecture aimed at establishing a sustained presence on the Moon.