In Simple Terms
Artemis 3 is not going to land astronauts on the Moon. Instead, its crew will practice connecting their spacecraft with two Moon landers while still close to Earth. The tests should help NASA spot problems before a later mission tries to land people near the Moon’s south pole in 2028. The launch date and choice of lander are still uncertain.
On October 23, 2026, NASA shared a detailed plan for Artemis 3. At first glance, the mission may look less like a trip to the Moon than a major practice run on the way there. The plan calls for the crew to fly in low Earth orbit, where their Orion spacecraft will practice rendezvous and docking with landers being developed by Blue Origin and SpaceX. The aim is to gain hands-on experience and make the next landing attempt safer. But the launch date and key parts of the plan remain vulnerable to schedule and supply challenges.
An Orbital Test Before Attempting a Landing
The difference between the two missions is central to understanding NASA’s plan. As currently outlined, Artemis 3 will not travel to the lunar surface. It will be a crewed test in orbit relatively close to Earth. The later goal, under Artemis 4, is to land astronauts near the Moon’s south pole in 2028, if preparations go as hoped. That makes the third mission a broad operational rehearsal: engineers and astronauts will check that the spacecraft can approach, connect, and work together before attempting more distant and complex operations.
This approach matters because Orion is different from the landers. Orion was designed for deep-space journeys far from Earth, while the planned test will take place in Earth orbit, where thermal conditions are different. Jeremy Parsons, NASA’s Artemis program manager, said that managing heat will require special attention. For that reason, the plan includes adjusting Orion’s orbit after launch. This stage will let the team test the spacecraft in conditions relevant to the mission, while keeping open the option of returning to Earth more quickly if the crew encounters a problem.
Three Rockets, One Campaign
The baseline plan depends on three launch vehicles lifting off from Florida’s Space Coast: Blue Origin’s New Glenn, NASA’s Space Launch System (SLS), and SpaceX’s Starship. This means the mission is not a single launch that ends once a crew reaches orbit. It is a sequence of flights and rendezvous that must line up in both timing and execution. Parsons described the campaign as highly complex because each stage depends on the readiness of the vehicles and the teams operating them.
Under the plan, New Glenn launches first, carrying Blue Origin’s Blue Moon lander into low Earth orbit. Next comes NASA’s Space Launch System, or SLS, carrying Orion and the Artemis 3 crew: NASA astronauts Randy Bresnik, André Douglas, and Frank Rubio, along with European Space Agency astronaut Luca Parmitano. Later, after some of the orbital tests and operations are complete, Starship launches to dock with Orion. This sequence shows why Artemis 3 is best understood as a coordinated effort involving different systems, rather than a test of just one spacecraft.
Orion’s First Days in Orbit
Orion will not go straight into its final working orbit. SLS will first place it in a highly elongated orbit, with a low point just 18 miles (29 kilometers) above Earth and a high point of 1,122 miles (1,806 kilometers). The spacecraft will then perform maneuvers to settle into an orbit about 345 miles (555 kilometers) high. Parsons said this route was chosen in part because the team needs to manage the thermal conditions around a spacecraft originally designed for deep-space missions.
The crew will spend 2 days checking Orion and its systems before moving on to the mission’s first major rendezvous. Their work will involve more than simply making sure the spacecraft functions. The team will also need to build a clear picture of Orion’s condition and prepare the crew for docking operations. When a mission involves multiple crewed spacecraft, understanding how each system performs—and how the systems interact—is part of the test itself.
Blue Moon Is the First Lander to Be Tested
On the third day of the flight, Orion is expected to rendezvous with Blue Moon at an altitude of about 273 miles (439 kilometers). After docking, the crew will open the hatch and enter the lander. They will test its environmental control and life-support systems and check whether it can maintain suitable air pressure. The plan also includes practicing emergency scenarios, testing how the two spacecraft are controlled together, and assessing whether ground teams are ready to manage these operations.
These tasks take the test beyond the design stage and put the spacecraft in astronauts’ hands. A life-support system, for example, cannot be judged simply by the fact that it exists on paper; it has to provide suitable conditions for the crew while they move around and work. Emergency drills also give the teams a chance to practice their response as part of the mission sequence, rather than discovering for the first time during a lunar landing attempt how well the spacecraft and mission control can coordinate.
Crew operations involving Blue Moon are expected to continue for about 2 days after docking. If this stage goes as planned, Starship would launch around the sixth day of the mission. So the Blue Moon test is more than a brief approach maneuver: it includes the crew entering the spacecraft and checking its interior environment and systems.
A Different Kind of Docking Test with Starship
The next stage will test another partner in NASA’s lunar-landing plan. The Starship involved in the trial will be the upper stage of SpaceX’s reusable rocket system, and it is 171 feet (about 52 meters) long. It is scheduled to carry a purpose-built docking adapter at its nose and rendezvous with Orion on the eighth day, at an altitude of about 237 miles (381 kilometers).
The astronauts will not enter Starship during this rendezvous, unlike the planned test with Blue Moon. The docking is expected to last about 2 hours. The focus will be on observing how the spacecraft make contact and how they press against each other as they approach and connect, as well as understanding how they operate together. These details could be crucial for later missions. Docking two spacecraft in space is not simply a matter of bringing them to the same place; it requires controlled movement and coordination among the spacecraft, crew, and mission-control teams.
Testing both landers on the same mission will give NASA data on two different ways of working with Orion: a longer test that includes the crew entering Blue Moon, and a shorter Starship test without the crew boarding it. This will not decide in advance which vehicle will be used for the next lunar landing, but it will give the agency practical evidence to compare the options and assess their readiness.
What Will the Crew Do After the Tests?
Orion’s separation from Starship will not bring the mission to an immediate end. Under the plan, the crew could spend another 6 to 9 days in space before returning to Earth. The flight will end with a splashdown after parachutes slow the spacecraft. The mission is planned to last 14 days, but it could stretch to 17 days. That extra time would allow the crew to complete other work rather than simply wait for the return date.
Among the crew’s tasks will be evaluating survival suits, a test that was not completed during the 10-day Artemis 2 flight around the Moon in April 2026. The plan also includes detailed health checks, scientific experiments, and technology demonstrations. These activities will broaden what NASA can learn from the flight, adding information about the crew and their equipment to the data on how the spacecraft behave during docking.
The broader idea is to use the fact that Orion will be close to Earth to train teams to work together and make decisions in real time during a crewed mission. If something goes wrong, the crew could return relatively quickly compared with a distant trip to the Moon. That does not make the tests risk-free, but it does provide a setting close to Earth in which to gain experience before moving on to landing operations, which demand tighter coordination and leave less room to handle surprises.
Which Lander Will Touch Down on the Moon for Artemis 4?
NASA has not yet decided whether Blue Moon or Starship will carry out the crewed landing on Artemis 4. The agency wants to keep both options open rather than rule out either approach before it has data on performance, readiness, and schedules. NASA Administrator Jared Isaacman said the agency wants to give both lander partners a chance to be ready before astronauts land near the Moon’s south pole in 2028. He added that the decision should be guided by what the data and schedule show.
The two vehicles would not necessarily follow the same operational route. In Blue Origin’s scenario, Orion would rendezvous with Blue Moon in lunar orbit. In SpaceX’s scenario, Starship would likely dock with NASA’s capsule in Earth orbit and then propel it toward the Moon. So the choice is not just about which lander to use. It also involves how the stages of the journey are divided and where the spacecraft meet.
Parsons noted, however, that both providers are planning lunar landing missions in 2028, regardless of which one gets there first. If those plans succeed, a crewed return to the lunar surface would be a major step after the last human landing, during Apollo 17 in 1972. But plans are not guarantees. Whether the systems are ready will depend on the test results and on progress in developing them.
A Target Date—and the Risk of Delays
NASA is targeting summer 2027 for the launch of Artemis 3, following the October 2026 announcement. Hitting that target could be difficult. The previous month, an internal memo reported that the mission was about 90 days behind schedule. That means the target date will need to be monitored closely; it does not mean the launch date is final or that the delay cannot change.
Parsons cited supply-chain problems affecting the landers as one of the challenges. The mission depends on spacecraft being developed by two companies, as well as on the readiness of SLS and Orion and on coordinating the launches and dockings. NASA officials have expressed confidence that the obstacles can be addressed, but optimistic statements do not remove the need to complete the technical and logistical work before setting a firm flight date.
The announced plan matters because it lays out in detail how NASA hopes to turn coordination among different spacecraft into experience that can be used on a later lunar mission. Artemis 3’s success will not be measured simply by whether the vehicles reach orbit or dock. What matters is what the tests reveal about life support, heat management, spacecraft operations, and the teams’ ability to respond to different situations. Those results will help clarify the path toward a 2028 landing.
The Bottom Line
Artemis 3 is designed to test crewed operations in Earth orbit before NASA attempts to return people to the Moon’s surface. In the current plan, New Glenn launches Blue Moon, SLS carries the Orion crew, and Orion docks first with Blue Moon and then with Starship, with a different kind of test for each lander. The mission is planned to last 14 days and could extend to 17, with the goal of reducing risks for Artemis 4, targeted for 2028. But the choice of lander and the planned summer 2027 launch—already reported to be about 90 days behind schedule in an internal memo—will depend on the test results and on whether supply and scheduling challenges can be resolved.