Artemis III

• 1. Introduction

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  Artemis III is NASA's second crewed mission in the Artemis lunar exploration program. It was once meant to put astronauts back on the Moon for the first time since Apollo 17 landed there in 1972. Two astronauts were meant to touch down in the Moon's south polar region and stay for about a week. The whole mission, including flights, would have lasted roughly 30 days, according to NASA. That plan no longer holds. Officials now describe the flight as broadly comparable to Apollo 9. That earlier Apollo program mission rehearsed docking and life support systems without ever reaching the lunar surface. A rocket built partly from hardware that once flew Space Shuttle missions still has to be finished. So does a capsule assembled across two continents, alongside two competing commercial landers built by rival companies. What made NASA abandon a Moon landing it had spent years preparing for, and what will Artemis III do instead?

• 2. The Mission That Changed

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  In 2023, NASA acknowledged that Artemis III might fly without ever landing on the Moon. The agency cited concerns about the Orion spacecraft's heat shield and delays in developing the Starship HLS lander. Planners studied alternatives, including a crewed visit to the Lunar Gateway space station, which has since been cancelled. Another option was a docking test between Orion and the Starship HLS conducted entirely in low Earth orbit.

  On the 27th of February 2026, NASA administrator Jared Isaacman confirmed the mission's new shape. Artemis III would test one or both landers in Earth orbit, and Artemis IV was tentatively named the first crewed lunar landing, targeted for 2028. NASA also scheduled the Artemis III crew to be revealed on the 9th of June 2026.

  The revised plan calls for astronauts to dock the Orion capsule with at least one lander, and possibly both, from SpaceX and Blue Origin. Crews would also test the landers' propulsion, life support, and communication systems, and possibly try out the new AxEMU spacesuits. In April 2026, Axiom confirmed it was working toward an AxEMU test flight in 2027. It had not yet decided whether that test would happen on Artemis III or aboard the International Space Station.

  Mission planners weighed a low Earth orbit profile against a high Earth orbit one. A low orbit would let NASA preserve its one remaining Interim Cryogenic Propulsion Stage for Artemis IV. A high orbit, by contrast, would better simulate the thermal and operational conditions astronauts would face near the Moon. As of April 2026, NASA had not finalized whether it would dock with one HLS vehicle or both. That decision depended partly on how quickly SpaceX and Blue Origin could ready their landers.

  By May 2026, NASA revealed that Artemis III would fly into a 463 kilometer low Earth orbit, a number that would soon shape decisions about the rocket meant to carry it there.

• 3. Building The Rocket

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  The core stage for Artemis III is set to fly on four RS-25 engines, designated E2048, E2052, E2054, and E2057. All four previously flew on Space Shuttle missions and were refurbished by Aerojet Rocketdyne before being assigned to this flight.

  In August 2025, NASA reported that processing had started on the core stage's lower boat tail section inside the Vehicle Assembly Building at Kennedy Space Center.

  Boeing finished building the core stage's upper section in April 2026 at NASA's Michoud Assembly Facility in New Orleans. That section includes the liquid hydrogen and liquid oxygen tanks, the intertank, and the forward skirt.

  The stage departed New Orleans on the 20th of April, arrived in Florida on the 27th, and was moved into the Vehicle Assembly Building on the 28th. The solid rocket boosters did not travel with that shipment. They are scheduled to be assembled in the months that follow. Once in place, technicians are set to install the engine section. Those refurbished engines are scheduled to arrive from Stennis Space Center in Mississippi no later than July 2026.

  The mobile launch tower went back to the Vehicle Assembly Building after Artemis II for refurbishment and preparation for the next round of stacking operations.

  In May 2026, NASA announced Artemis III would not use the agency's sole remaining Interim Cryogenic Propulsion Stage, saving it instead for Artemis IV. In its place, engineers are building a spacer, a structure that matches an upper stage's dimensions without any propulsive capability. NASA said design and fabrication of that spacer was already underway at the Marshall Space Flight Center.

  While Boeing and Aerojet Rocketdyne pieced together the rocket, Lockheed Martin and Airbus were racing to finish the spacecraft meant to ride on top of it.

• 4. Orion Takes Shape

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  Airbus delivered the European Service Module for this flight, designated ESM-3, from its facility in Bremen, Germany, sometime in September 2024.

  Lockheed Martin built the spacecraft's pressure vessel at the Michoud Assembly Facility and shipped it to the Kennedy Space Center in August 2021 for final assembly.

  As of early 2026, production of the Artemis III Orion spacecraft was still underway, with an internal readiness target of January 2028. After the mission's plan shifted toward a late 2027 launch, NASA and Lockheed Martin took steps to speed up the pace of Orion production.

  Orion's job on this flight is to dock with whichever lander is ready to meet it, a rendezvous that depends on hardware built by two competing companies.

• 5. Two Landers, One Decision

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  SpaceX's Starship HLS and a Blue Origin lander, reportedly a crewed variant of Blue Moon Mark 1, are the two landers Artemis III may test. Both vehicles still have to complete NASA's human-rating certification process before any crewed operations can happen.

  As of May 2026, the maturity of both landers remained unclear. A NASA statement called the vehicles pathfinders and said the agency was still defining the concept of operations for the mission. NASA added that Artemis III astronauts could potentially enter at least one lander test article, language suggesting procedures were not yet finalized.

  If astronauts are not expected to conduct independent operations, one or both landers might lack fully functioning life support systems. Other crew-capable hardware might also be missing at the time of the flight.

  The spacesuit under consideration, the Axiom Extravehicular Mobility Unit, was designed by Axiom Space in collaboration with the fashion house Prada.

  Whichever lander flies, its hardware traces back to a program shaped as much by budget fights as by engineering, a story that stretches back nearly a decade.

• 6. Instruments For The Moon

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  NASA announced the scientific payloads for Artemis III in March 2024, led by a compact seismometer suite called the Lunar Environment Monitoring Station, or LEMS. LEMS is designed to characterize the regional structure of the Moon's crust and mantle, feeding models of how the Moon formed and evolved.

  A second instrument, Lunar Effects on Agricultural Flora, or LEAF, will study how the lunar surface environment affects crops grown in space.

  The third, the Lunar Dielectric Analyzer, or LDA, is an internationally contributed payload that measures how well the Moon's regolith propagates an electric field.

  Whether LEMS, LEAF, and LDA ever fly depends on money as much as hardware. In 2025, the rocket meant to carry them nearly lost its funding entirely.

• 7. A Program Built On Delays

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  The Artemis program traces back to December 2017, when the first Trump administration ratified Space Policy Directive 1. That directive established a crewed lunar campaign built around the Orion Multi-Purpose Crew Vehicle and a lunar orbit space station. The mission that became Artemis III was originally billed as Exploration Mission-3, tasked with sending four astronauts into a near-rectilinear halo orbit around the Moon. It was also meant to deliver the ESPRIT module and the U.S. Utilization Module to the planned Gateway station.

  By May 2019, both ESPRIT and the Utilization Module, renamed HALO, were shifted to fly separately on a commercial rocket. Artemis III was then repurposed to speed up the program's first crewed lunar landing to the end of 2024. The plan called for Orion to dock with a minimal Gateway made up only of a Power and Propulsion Element and a small habitat and docking node. By early 2020, NASA dropped that Gateway rendezvous in favor of docking Orion directly with the Human Landing System, pushing Gateway's delivery to after Artemis III.

  An August 2021 audit by the U.S. government's Office of Inspector General concluded the new spacesuits would not be ready before April 2025 at the earliest. That finding threatened the mission's planned late 2024 launch. On the 9th of November 2021, NASA Administrator Bill Nelson confirmed Artemis III would fly no earlier than 2025. In June 2023, Jim Free, NASA's associate administrator for exploration systems development, said launch would probably slip no earlier than 2026. By December 2023, the U.S. Government Accountability Office reported the mission was unlikely before 2027. In January 2024, NASA officially pushed the launch to no earlier than September 2026. NASA delayed the mission again in December 2024, this time to no earlier than 2027. In January 2026, the date slipped again to no earlier than 2028. Weeks later, NASA revised the plan once more, landing on the late 2027 target that still stands. On the 27th of April 2026, Administrator Jared Isaacman confirmed that target before the House Appropriations Committee. He explained that the earlier goal of early 2027 had slipped because of delays developing both Starship HLS and Blue Moon.

  On the 2nd of May 2025, the second Trump administration proposed a budget that would cancel SLS and Orion after Artemis III. The proposal cited the SLS's cost of 4 billion dollars per launch as the reason. On the 4th of July 2025, President Donald Trump signed the One Big Beautiful Bill Act into law. That legislation included funding to keep SLS and Orion in development and operation beyond Artemis III.

  That legislation keeps the 4 billion dollar per launch rocket flying for now. How many more times its launch date moves before Artemis III finally lifts off remains an open question.