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

A year inside a 3D-printed Mars simulator

Four NASA research volunteers are living inside Mars Dune Alpha, a 1,700-square-foot 3D-printed habitat at Johnson Space Center in Houston. The group entered in October 2025 and will remain inside until late October 2026, making this the longest continuous habitat simulation NASA has ever run.

The mission, called CHAPEA (Crew Health and Performance Exploration Analog), is designed to study how people cope with the confinement, resource limits, and isolation of a real Mars surface mission. Crew members follow a strict daily schedule of simulated spacewalks, equipment maintenance, crop growing, and exercise.

The habitat itself

Mars Dune Alpha was 3D-printed using a concrete-like material called Lavacrete. The structure includes separate zones for living, working, and growing food. The interior is designed to feel as much like a Mars base as possible: limited communications with a 22-minute delay, rationed supplies, and the occasional simulated equipment failure.

Ross Elder, Ellen Ellis, Matthew Montgomery, and James Spicer are the CHAPEA Mission 2 crew. All four went through extensive isolation and survival training before entering the habitat.

What researchers are learning

The mission focuses on physical and behavioral health, team dynamics, and food systems. Crew members grow leafy greens inside the habitat and evaluate how well different crop systems sustain a small crew over long durations. Data from CHAPEA will directly inform life support design for future Mars missions.

Mission 1 ran from June 2023 to July 2024. That crew logged 378 days inside Dune Alpha, establishing a baseline for crew performance, sleep patterns, and conflict resolution under confinement. Mission 2 builds on those findings with refined protocols and new crop experiments.

Why this matters for space 3D printing

Mars Dune Alpha is one of the largest 3D-printed structures ever built for human habitation. The printing method used to create it is the same approach NASA and private partners are exploring for actual Mars surface bases. If humans ever do build habitats on Mars, they will likely print them on-site using indigenous materials rather than launching finished structures from Earth.

CHAPEA is not a test of rocket technology or life support engineering in isolation. It is a test of whether humans can actually live inside these environments for months at a time without cracking. The results will shape habitat specifications for Artemis and any future Mars architecture.