NASA Crew Is Halfway Through a Year-Long Stay in a 3D-Printed Mars Habitat

Four people have been living inside a 3D-printed habitat at NASA's Johnson Space Center in Houston since October 19, 2025. They are part of the second Crew Health and Performance Exploration Analog mission, or CHAPEA, and they will not step outside until October 31, 2026.

The habitat, called Mars Dune Alpha, was designed by the architecture firm BIG and 3D printed by ICON. It measures 1,700 square feet and contains crew quarters, a kitchen, exercise areas, and workspaces. The whole point is to simulate what life might actually be like on Mars: confined, isolated, and dependent on closed-loop systems.

Why 3D printing matters here

NASA did not choose ICON by accident. The agency wants to build actual habitats on Mars using local materials and robotic construction. ICON's 3D printing technology is the leading candidate for that job. The CHAPEA mission tests the human side of living inside structures built that way.

The first CHAPEA crew finished their mission in 2023. This second crew is helping NASA refine the schedule, the food systems, and the psychological support protocols before the first real Mars mission ever launches.

What the crew does

While inside, the crew conducts simulated spacewalks, grows vegetables, maintains equipment, and runs experiments on how isolation affects decision making and group dynamics. They also communicate with mission control on a 22-minute delay, matching the real light-time lag between Earth and Mars.

So far the mission has run without major incidents. NASA has released periodic status updates, but the detailed science results will not be published until after the crew exits.

The bigger picture

Mars Dune Alpha is one piece of a much larger program. NASA is simultaneously testing surface power systems, radiation shielding, and in-situ resource utilization. 3D-printed habitats are central to the plan because they can be built before humans arrive and expanded as the crew grows.

If the CHAPEA 2 crew completes its year without serious issues, the data will feed directly into the next round of habitat designs. That means the next mock Mars habitat, and eventually the real one, will likely be 3D printed by the same company that built this one.