NASA's Simulated Mars Crew Hits One Year in Houston Habitat, Exit Set for Oct. 31

Four crew members in NASA's CHAPEA Mission 2 have completed one year living in isolation inside a confined habitat at NASA's Johnson Space Center in Houston. The milestone, marked on October 19, 2026, brings the 378 day simulated Mars mission close to its conclusion, with health and performance data expected to inform future long-duration missions.

For the past 365 days, the crew has operated as though they were on Mars, growing crops, managing limited resources, navigating communication delays, and conducting suited extravehicular activities on a simulated Martian surface. The crew entered the 1,700 square foot 3D-printed habitat on October 19, 2025. As the one-year mark approached, NASA science teams prepared to process the health and performance data collected during the mission.

The crew includes Ross Elder, mission commander; Ellen Ellis, medical officer; Matthew Montgomery, science officer; and James Spicer, flight engineer. They will exit the habitat on Saturday, October 31, to conclude the mission, after which they will reconnect with families they have only reached via email with a Mars-like communication delay during the mission. The crew will then begin two weeks of post-mission evaluations and debriefs with NASA scientists.

Grace Douglas, CHAPEA principal investigator, said the team is proud of the crew's commitment and achievements over the past year on a fast-paced, highly demanding mission, and that the entire team is excited to congratulate the crew in person. The communication delay during the mission lasted up to 45 minutes each way. NASA says the collected data could shed light on how limited food and exercise systems influence the ability to achieve mission objectives, including spacewalks on the surface of Mars, and could help the agency build decision-making support systems that aid crews facing communication delays.

NASA says the debriefs and evaluations will help scientists learn what it takes for crews to adapt to the routines and demands of daily life on long-duration missions, giving insight into what future explorers may need to stay healthy, productive, and connected during missions far from Earth. Michael Stenger, chief scientist for NASA's Human Research Program, said the mission has been valuable in beginning to teach the agency the requirements for year-long missions, including medical and psychological care across communication delays. He added that combining the Mars-realistic analog with physiological, psychological, and performance measures in a rigorously controlled environment will allow NASA to translate the knowledge to Moon Base and beyond.

The CHAPEA Mission 2 egress ceremony will take place on October 31 and will be available to watch online. Following the egress, the crew begins two weeks of post-mission evaluations and debriefs with NASA scientists.