The moon is not the destination. It is the classroom.
On September 10, Jacob Bleacher stood before a virtual workshop audience and said something that reframed the entire Artemis program in a single sentence. The moon, he made clear, is not the destination. It is the classroom.
Bleacher is NASA's chief exploration scientist and a planetary geologist by training. His official mandate covers technology and architecture development for human exploration of both the moon and Mars — and at a workshop convened to help scientists weigh in on candidate landing sites for the Artemis 4 mission, he was candid about the larger ambition driving the work. The agency, he said, wants to learn how to live away from Earth. The Apollo missions of the 1960s and 1970s were extraordinary, but they were also brief — two or three days on the surface, then home. What NASA is building toward now is something fundamentally different in scale and intention.
The Artemis 4 workshop was a practical exercise as much as a philosophical one. Scientists and community participants were asked to provide what NASA calls "science figures of merit" — essentially a ranked framework for evaluating which candidate landing sites offer the greatest scientific return. The criteria under consideration range from understanding how planets evolve, to studying the processes that shape lunar dust, to objectives in solar and physical sciences. The South Pole-Aitken basin, where Artemis astronauts are expected to land, has been a top priority in both the 2013 and 2023 planetary decadal surveys — the documents through which the scientific community collectively signals which missions matter most.
Artemis 4 is currently scheduled to launch no earlier than 2028, though that date depends on the progress of earlier missions in the program. For context: no Artemis crew has yet left Earth. The four astronauts assigned to Artemis 2 — NASA's Reid Wiseman, Victor Glover, and Christina Koch, along with Canadian Space Agency astronaut Jeremy Hansen — are preparing for a lunar flyby mission targeted for as soon as April 2026. That mission will not land. Artemis 1, an uncrewed test flight, circled the moon and returned in 2022.
When Artemis 4 does fly, its crew will spend six days on the lunar surface — triple the longest Apollo surface stay. They will collect soil samples to bring back to Earth, conduct astronaut observations and instrument-based science, and complete up to four moonwalks, venturing as far as 1.2 miles from their lander. The exact landing site has not been chosen, but it will be somewhere in the south polar region, where water ice and other resources may be accessible for future use.
That word — resources — points toward something Bleacher is equally focused on: the economics of sustained lunar presence. He wants to see not just NASA infrastructure on the moon, but a commercial ecosystem that can grow alongside it. The cost and complexity of deep space missions means the agency cannot go it alone, and Bleacher was direct about the question NASA is trying to answer: what does the government need to put in place to attract and sustain private partners, and what would actually drive a functioning lunar economy?
The Artemis program already operates within a broad international framework. Dozens of nations have signed the Artemis Accords, an American-led agreement establishing norms for deep space exploration. The program's ambitions — longer stays, resource utilization, commercial partnerships, permanent presence — are all oriented toward a future in which the moon is not a destination visited and abandoned, but a proving ground for the harder journey beyond it.
The next milestone is Artemis 2, the first crewed mission, which will loop around the moon without landing. After that comes Artemis 3, the first crewed landing. Artemis 4 follows, and with it the first serious attempt to demonstrate that humans can not just visit the moon, but begin to understand what it takes to stay.
Notable Quotes
We want to begin to learn how to live away from the Earth. We're really on a different trajectory here than Apollo.— Jacob Bleacher, NASA chief exploration scientist
What do we need to put in place that welcomes and encourages partnership so that we really can develop a longer-term — maybe even permanent — presence on the moon?— Jacob Bleacher, NASA chief exploration scientist
The Hearth Conversation Another angle on the story
Why hold a landing site workshop this early, when the mission is still years away?
Because choosing where to land shapes everything — what science you can do, what resources you can access, how safe the crew is. You can't make that call at the last minute.
What makes the south pole so important compared to where Apollo landed?
Apollo touched down near the equator, where the terrain was relatively flat and well-lit. The south pole is harder to reach but potentially far richer — there's water ice in permanently shadowed craters, and ice changes everything if you're thinking about long-term habitation.
Bleacher kept connecting the moon to Mars. Is that a new emphasis, or has NASA always framed it that way?
It's been part of the rhetoric for a while, but the Artemis program is the first time the architecture is actually being built with Mars in mind. Six days on the surface, resource extraction, commercial partnerships — none of that was part of Apollo's design.
Six days sounds modest. Is that really enough to learn what they need to learn?
It's a start. Apollo's longest surface stay was less than three days. Six days is a meaningful step up, and the point isn't to solve everything on one mission — it's to build the knowledge base incrementally.
What does a lunar economy actually mean in practice?
It means companies finding reasons to be there beyond what NASA pays them to do. Mining, manufacturing, tourism eventually — the idea is that NASA builds the infrastructure and the rules, and then gets out of the way enough for private interests to take root.
Is 2028 a realistic launch date for Artemis 4, given that no crew has launched yet?
Realistically, it's a target more than a guarantee. Artemis 2 is aiming for April 2026, Artemis 3 has to land first, and then Artemis 4 follows. Each mission depends on the one before it going well.
What's the thing this story is really about, underneath the mission details?
It's about NASA trying to make space exploration something that doesn't stop when the funding cycle ends. The moon as a permanent outpost, not a flag-and-footprints moment. That's the actual ambition.