NASA's Artemis III mission, scheduled for 2027, marks a significant and high-stakes moment in the evolving race to return humans to the moon. Unlike prior missions, Artemis III will serve as a critical test of competing lunar landers developed by two leading aerospace companies, SpaceX and Blue Origin, positioning the mission as not only a technological challenge but also a competition between these industry giants to secure a pivotal role in future lunar exploration.
Following the successful Artemis II mission, which recently completed a crewed lunar flyby and splashdown, NASA is now shifting focus to Artemis III. This upcoming mission will not involve landing astronauts on the moon but will instead test the docking and operation of lunar landers in Earth orbit. The plan involves launching an Orion crew capsule carrying astronauts into orbit around Earth, where they will attempt to rendezvous and dock with a lunar-lander vehicle. Two landers are in development for this purpose: SpaceX's Starship Human Landing System (HLS) and Blue Origin's Blue Moon Mark 2 lander.
NASA Administrator Jared Isaacman explained that Artemis III is modeled after the 1969 Apollo 9 mission, which was a critical test of lunar module operations in Earth orbit before the first moon landing. Similarly, Artemis III aims to reduce risk by rehearsing key maneuvers such as docking and crew transfer between spacecraft closer to home before attempting a crewed moon landing. The actual lunar landing with astronauts is now planned for Artemis IV, set for 2028, allowing NASA more time to validate the technologies and operations required for a safe and successful touchdown on the lunar surface.
Isaacman emphasized NASA's desire to accelerate progress in lunar exploration, critiquing decades of cautious and slow development that led to costly delays, wasted resources, and fewer flagship science missions. "We are long past the time for Word and PowerPoint," he stated, underscoring the agency's determination to move beyond talk and toward rapid, tangible progress. However, NASA officials also stress that Artemis III's approach remains prudent: conducting the initial docking tests in Earth orbit allows for quick return options if problems arise, minimizing risks to astronaut safety.
Lori Glaze, acting associate administrator for NASA's Exploration Systems Development Mission Directorate, highlighted the importance of Artemis III in "bringing down some of the risk" for subsequent moon landings. The mission will proceed with whichever lander is ready, potentially testing one or both systems depending on their development progress. This approach also ensures NASA maintains flexibility in its lunar plans, not hinging success on a single technology.
The two competing landers are markedly different in design and capability. SpaceX's Starship HLS is based on the company's large, fully reusable Starship spacecraft. It stands approximately 172 feet tall and is designed to land upright on the moon, potentially transporting up to 100 tons of cargo. Astronauts would descend to the lunar surface using a side-mounted elevator platform. SpaceX has reported significant milestones in Starship HLS development, including airlock and rocket testing, but recent updates have been sparse. Notably, CEO Elon Musk recently shifted focus toward building a "self-growing city on the Moon," signaling ambitious long-term goals beyond Mars colonization.
In contrast, Blue Origin's Blue Moon Mark 2 lander is smaller and more reminiscent of earlier lunar modules, standing about 52 feet tall with four landing legs. It is also reusable but carries less cargo-up to 22 tons. Blue Origin has been developing life-support systems internally and continues to test the lander's components. A cargo-only version, Mark 1, is slated for a "Pathfinder" mission to the lunar surface later this year to demonstrate landing capabilities and is currently undergoing vacuum chamber testing at NASA's Johnson Space Center.
Both landers face a significant challenge before reaching the moon: refueling in Earth orbit. This complex procedure, which involves multiple launches of fuel tankers, has been scarcely tested and represents a critical technical hurdle. Successful orbital refueling is essential for either lander to make the journey to lunar orbit, where they would dock with the Orion spacecraft carrying astronauts. Once docked, two of the four crew members would transfer to the lander to descend to the moon's surface.
The upcoming months will be crucial in determining the trajectory of these lunar landers. SpaceX is preparing for the next test flight of its Starship rocket, a highly anticipated event that has been delayed until May 2026. This flight will be the first attempt to place Starship's upper stage into Earth orbit and is seen as a major milestone for the company and NASA alike. The timing of this launch coincides with SpaceX's move to sell stock publicly, with a valuation estimated at $1.75 trillion, adding significant financial and public relations stakes to the mission's success.
Blue Origin, meanwhile, is progressing with its planned "Pathfinder" mission and the preparation of the VIPER rover mission, set to launch by late 2027 aboard another Mark 1 lander. VIPER will explore the lunar south pole, prospecting for water ice, a vital resource for sustainable lunar habitation.
Within NASA, attention is also focused on the readiness of the mobile launcher for the Artemis III mission. This massive ground support structure is critical for the launch of NASA's Space Launch System (SLS) rocket, which will carry the Orion spacecraft to orbit.
Looking beyond Artemis III, both SpaceX and Blue Origin must conduct successful uncrewed landings and return tests of their lunar landers before astronauts can safely use them on the lunar surface in 2028. In addition, NASA plans at least two dozen precursor launches to deliver rovers, scientific instruments, and other infrastructure elements needed to support sustained lunar operations. Carlos Garcia-Galan of NASA has underscored the importance of maintaining a rapid launch cadence to meet the agency's ambitious goal of establishing a $30-billion lunar base by 2036.
Another piece of the Artemis puzzle is the development of next-generation space suits. A new suit designed by Axiom Space, initially intended for the Artemis III lunar mission, recently passed a technical review at NASA, signaling progress in ensuring astronauts will have advanced and reliable gear for moonwalks.
NASA continues to refine mission details as it awaits formal responses from SpaceX and Blue Origin regarding the agency's updated lunar base plans. One outstanding question is the specific Earth orbit in which Artemis III will conduct its docking tests. A lower orbit could conserve rocket fuel needed for subsequent missions, while a higher orbit might better simulate the conditions of lunar orbit, aiding in mission rehearsal.
Despite the uncertainties, NASA remains committed to the goal of landing astronauts on the moon by 2028. Lori Glaze affirmed that both SpaceX and Blue Origin are taking this imperative seriously and that Artemis III represents a crucial step toward achieving that historic milestone.
In sum, Artemis III is more than just a mission; it is a pivotal testbed for the future of human lunar exploration. By fostering competition and redundancy through two distinctly different lander designs, NASA aims to accelerate its return to the moon while minimizing risk. Success in this mission will not only pave the way for Artemis IV's crewed moon landing but also set the stage for the long-term vision of a permanent lunar base, positioning the United States at the forefront of 21st-century space exploration.
Dan Vergano, senior editor at Scientific American, has reported extensively on space exploration and science policy. His coverage highlights the challenges and opportunities facing NASA and its commercial partners as humanity prepares to return to the moon and beyond.