NASA Prepares to Launch Artemis 2 Moon Mission on April 1

On March 20, 2026, NASA's Space Launch System rocket completed an 11-hour crawl from the Vehicle Assembly Building to Launch Pad 39B at Kennedy Space Center, traveling the four-mile route at a top speed of 0.82 miles per hour [1]. Four astronauts are now in quarantine. If the weather and hardware cooperate, they will launch no earlier than April 1 at 6:24 p.m. ET on a 10-day journey around the Moon — the first time humans have left low Earth orbit since December 1972 [2][3].

Artemis 2 is both a technical proving flight and a statement of national intent. It will validate the Orion crew capsule and its European-built service module with living, breathing occupants for the first time. It will set distance records. And it will test whether a heat shield that cracked apart during its last flight can protect a human crew on this one.

The Crew: Four Astronauts, Several Firsts

Commander Reid Wiseman, a U.S. Navy test pilot, spent six months on the International Space Station in 2014 and conducted multiple spacewalks [4]. Pilot Victor Glover, who flew as pilot on SpaceX's first operational Crew Dragon mission in 2020, will become the first Black astronaut to travel beyond low Earth orbit [4]. Mission Specialist Christina Koch holds the record for the longest single spaceflight by a woman at 328 days and participated in the first all-female spacewalk [4]. Mission Specialist Jeremy Hansen, a Royal Canadian Air Force fighter pilot, will become the first non-American to leave Earth orbit [4].

These four will join an exclusive group. Only 24 humans — all American men, all Apollo astronauts — have previously traveled beyond low Earth orbit [5]. Artemis 2 will add the first woman, first person of color, and first non-U.S. citizen to that list.

The Mission Profile: 10 Days, 250,000 Miles

Artemis 2 follows a free-return trajectory — a figure-eight path that uses lunar gravity to swing the spacecraft back toward Earth even if the main engine fails [6]. The mission unfolds in stages: after launch, Orion will orbit Earth twice in increasingly higher orbits before a trans-lunar injection burn sends it toward the Moon [6]. The crew will spend roughly four days in transit, pass within approximately 8,000 kilometers (5,000 miles) of the lunar surface on the far side, and then ride the gravitational slingshot home for a Pacific Ocean splashdown [6][7].

At its farthest point — roughly 5,000 miles beyond the Moon — Artemis 2 is expected to break the record for the greatest distance any human has traveled from Earth, currently held by the Apollo 13 crew at 248,655 miles [3]. The transit around the far side will produce about 40 minutes of radio silence between Orion and Mission Control, as the Moon blocks all communication [8].

The crew's primary job is to evaluate systems that could not be tested without humans aboard. These include life-support and environmental controls under real biological loads, manual piloting and proximity operations, deep-space communication and navigation systems, and the cabin environment's ability to sustain human health over an extended mission [7]. The astronauts will also participate in biological research through the AVATAR project, using organ-on-chip devices to study the effects of radiation and microgravity on human tissue [7].

The Heat Shield Problem

Artemis 2's most scrutinized component is the same type of heat shield that failed to perform as expected on its predecessor.

When the uncrewed Artemis 1 Orion capsule returned to Earth in December 2022, engineers found more than 100 locations where charred material had broken away from the ablative heat shield [9]. The shield is made of Avcoat, a material designed to char and ablate during reentry, absorbing heat in the process. But the material loss on Artemis 1 exceeded predictions.

NASA's investigation determined that gases generated inside the Avcoat during reentry could not vent properly, causing internal pressure to build until sections cracked and broke off [9][10]. The agency identified the "skip entry" technique — where the capsule briefly dips into the atmosphere, bounces back upward, then reenters — as a contributing factor. During the skip phase, heating rates dropped, allowing gases to form inside the material before it was subjected to a second round of intense heating [10].

Rather than redesign or replace the heat shield, NASA chose to modify the reentry trajectory. Artemis 2 will fly a steeper entry profile and eliminate the skip maneuver, shortening the time the spacecraft spends in the temperature range where the problem occurred [10][11].

Not everyone at NASA — current or former — is satisfied with this approach. Charlie Camarda, a former NASA astronaut and heat shield expert, called it "crazy," arguing that the root cause should have been fixed rather than worked around: "We could have solved this problem way back when. Instead, they keep kicking the can down the road" [12]. Dan Rasky, a thermal protection materials veteran at NASA, warned that spalling "means you're right at the point of incipient failure now. It's like you're at the edge of the cliff on a foggy day" [12].

Defenders of the decision point to additional analysis and ground testing that NASA says demonstrates adequate safety margins even under conditions exceeding those expected during Artemis 2's reentry [11]. Former astronaut Danny Olivas, who investigated the heat shield, acknowledged it will likely crack again but expressed confidence in the redundant protective layers beneath the Avcoat, stating NASA "understand[s] what they have" [12]. NASA Administrator Jared Isaacman declared that the agency has "regained margin to safety" with the modified trajectory [12].

NASA's Office of Inspector General noted that the agency determined the root cause but initially declined to disclose specifics publicly, pending additional validation testing [13]. This lack of transparency drew criticism from oversight bodies and independent analysts.

The Price Tag: $93 Billion and Counting

The Artemis program's cost is its most persistent source of controversy. NASA's Inspector General estimated in 2024 that the agency will have spent approximately $93 billion on Artemis through 2025, encompassing the SLS rocket, Orion capsule, Exploration Ground Systems, and related infrastructure [14]. By September 2025, spending on just the SLS, Orion, and ground systems had exceeded $55 billion [8].

Each SLS launch costs roughly $4.1 billion, according to the Inspector General — a figure that includes the expendable rocket, the capsule, and launch operations [14]. The SLS core stage and solid rocket boosters are discarded after every flight; unlike SpaceX's Falcon 9 or the in-development Starship, nothing is recovered or reused.

For context, the entire Apollo program cost approximately $257 billion in inflation-adjusted 2023 dollars across 17 missions (including uncrewed tests) [15]. The per-astronaut cost tells a stark story: Apollo flew 33 astronauts to space across its crewed missions, while Artemis 2 will carry four astronauts on a single $4.1 billion launch.

Artemis represents a significant share of NASA's budget. The FY 2026 budget request allocates roughly $7 billion to Artemis and lunar exploration out of a total NASA budget of $18.8 billion — approximately 37 percent of the agency's funding [16]. That budget request, released by the Trump administration in May 2025, represented a 24 percent cut to NASA's overall budget and proposed canceling the SLS and Orion after Artemis 3, citing the $4 billion per-launch cost as unsustainable [16][17].

Source: NASA Budget Fact Sheets / OIG Reports

Data as of Mar 25, 2026CSV

The SpaceX Comparison

The cost debate intensifies when set alongside commercial alternatives. SpaceX CEO Elon Musk has estimated Starship's total development cost at $2.5 billion to $5 billion [15]. SpaceX won a $2.9 billion NASA contract to develop a lunar-specific version of Starship as the Human Landing System for Artemis 3 [15]. If those figures hold, the entire Starship program — including a vehicle designed to be fully reusable — would cost less than two SLS launches.

Critics argue that Artemis 2's value proposition is thin: the mission will not land on the Moon, will not establish any permanent infrastructure, and will not test the landing systems needed for future missions. A lunar flyby, they contend, could be accomplished for a fraction of the cost using commercial vehicles.

NASA's counter-argument rests on several points. First, Artemis 2 validates the only currently certified deep-space crew vehicle — no commercial alternative yet exists that can carry humans beyond low Earth orbit and return them safely through a 25,000-mph atmospheric reentry [7]. Second, the mission tests integrated systems (life support, navigation, communication) under real conditions that no robotic mission can replicate. Third, the data gathered on human physiology during the 10-day flight feeds directly into planning for longer lunar surface missions [7].

The agency has also signaled a shift toward commercial hardware for future missions. On March 24, 2026, NASA announced plans to incorporate more commercially procured and reusable systems for lunar missions, initially targeting landings every six months [18]. Administrator Isaacman's February 2026 decision to cancel the more expensive SLS Block 1B and Block 2 upgrades — standardizing on the current Block 1 configuration — reflected this cost-conscious direction [18].

The Pace Problem: Apollo vs. Artemis

The Apollo program moved at a speed that looks almost reckless by modern standards. Apollo 7, the first crewed test flight, launched in October 1968. Just two months later, Apollo 8 carried three astronauts around the Moon. Seven months after that, Apollo 10 conducted a full dress rehearsal in lunar orbit. And in July 1969 — nine months after the first crewed flight — Apollo 11 landed on the Moon [19].

Artemis operates on a fundamentally different timeline. Artemis 1 launched in November 2022. If Artemis 2 flies on April 1, 2026, the gap between the uncrewed test and the first crewed flight will be roughly 3 years and 4 months [2]. The gap between Apollo's uncrewed equivalent (Apollo 4 in November 1967) and its first crewed lunar flight (Apollo 8 in December 1968) was 13 months.

Several factors explain the difference. The Apollo program operated under Cold War urgency, with intelligence suggesting the Soviet Union was planning its own circumlunar flight [19]. NASA's workforce and budget peaked at levels far above today's — Apollo consumed over 4 percent of the federal budget at its height, compared to roughly 0.5 percent for NASA today [15]. The Artemis 1 heat shield anomaly triggered a lengthy investigation that pushed Artemis 2 back by over a year [10]. And political turbulence has compounded technical delays: the agency lacked a confirmed administrator for 11 months before Isaacman's confirmation in December 2025, and workforce morale has suffered from proposed budget cuts and furloughs [20].

International Partners

Artemis 2 is not a solely American endeavor. The European Space Agency provides the European Service Module (ESM-2), which supplies Orion's propulsion, electrical power, water, air, and thermal control [21]. Built by Airbus in Bremen, Germany, the module includes contributions from more than 20 companies across 10 European countries [21]. ESA has committed to building service modules for subsequent Artemis missions as well, with contracts for at least three additional units [22].

Canada's contribution extends beyond Jeremy Hansen's seat on Artemis 2. The Canadian Space Agency is developing Canadarm3, a robotic arm system for the planned Lunar Gateway station [4]. Hansen's inclusion on the crew reflects a bilateral agreement between NASA and CSA — a partnership model similar to the barter arrangements that sustained the International Space Station, where partner agencies contribute hardware and expertise in exchange for crew access and research opportunities [23].

Japan's JAXA is also a partner in the broader Artemis program, contributing to the Gateway and future surface missions [23]. The Artemis Accords, signed by over 40 nations, provide a broader framework for international cooperation, though they do not include binding crew-access guarantees comparable to ISS intergovernmental agreements [23].

What Comes After: Artemis 3 and the Lunar Landing

If Artemis 2 succeeds, attention shifts immediately to Artemis 3 — and its complicated path forward. Originally conceived as a lunar landing mission, Artemis 3 has been restructured. In late February 2026, Administrator Isaacman announced that Artemis 3, now targeting mid-2027, would no longer attempt a Moon landing [24]. Instead, it will conduct rendezvous and docking tests in low Earth orbit with one or both commercial lunar landers — SpaceX's Starship HLS and Blue Origin's Blue Moon — along with tests of the new Axiom space suit [24].

The first potential lunar landing has been pushed to Artemis 4, tentatively planned for 2028 [24]. This represents the latest in a long series of schedule slips. When the Artemis program was announced in 2019, the target for a crewed lunar landing was 2024. That date slipped to 2025, then to September 2026, then to mid-2027, and now the landing itself has been deferred to Artemis 4 [25][26].

The bottleneck is SpaceX's Starship Human Landing System. The vehicle requires orbital refueling — up to 12 tanker flights to fill its propellant tanks in space before it can reach the lunar surface [25]. SpaceX is targeting June 2026 for its first orbital refueling demonstration and June 2027 for an uncrewed lunar landing [25]. NASA's Aerospace Safety Advisory Panel has warned that the Starship HLS timeline could slip by "years" [26].

Source: NASA OIG / SpaceNews / Space.com reporting

Data as of Mar 25, 2026CSV

The Bigger Picture

Artemis 2 launches into a political and fiscal environment that bears little resemblance to the one that conceived the program. The Trump administration's FY 2026 budget proposal would end SLS and Orion production after Artemis 3, cut NASA's budget by nearly a quarter, and reduce the agency's workforce by roughly a third [16][17]. Congress has not yet acted on these proposals, and significant opposition exists on both sides of the aisle from lawmakers who represent districts with NASA centers and contractor facilities.

Meanwhile, China's lunar program continues to advance. The China National Space Administration has stated its intention to land astronauts on the Moon by 2030, a timeline that has added urgency to American lunar ambitions [20]. The restructured Artemis plan — with Isaacman explicitly citing the goal of returning astronauts to the Moon "before China" — reflects this competitive pressure [16].

On April 1, four astronauts will strap into a capsule atop 8.8 million pounds of thrust and attempt something no human has done in over half a century. The 10-day flight will not land on the Moon, will not build a base, and will not resolve the debates about cost, pace, or the program's long-term architecture. What it will do — if the heat shield holds, if the life support works, if the service module performs — is prove that the hardware can keep humans alive in deep space. For a program that has spent $93 billion to reach this point, that proof is both the minimum acceptable outcome and, for the crew and engineers involved, a profound one.