NASA’s CHAPEA 2 Crew Marks 200 Days in Simulated Mars Mission

Milestone Achievement

The four crew members of NASA’s CHAPEA (Crew Health and Performance Exploration Analog) mission 2 reached 200 days into their 378-day simulated Mars mission on May 7, 2025. As of this date, the crew is undergoing a simulated two-week loss-of-signal period, during which they operate entirely without contact with mission control, following preplanned procedures.

The data will inform mission planning, habitat design, and support systems for crewed missions to the Moon and Mars.

Crew Details

The crew entered the 3D-printed habitat at NASA’s Johnson Space Center in Houston on October 19, 2024, and is scheduled to exit on October 31, 2025.

Mission Activities

During the mission, the crew has completed a range of tasks, including:

• Robotic operations
• Habitat maintenance
• Crop cultivation within the 1,700-square-foot habitat

They also face simulated mission constraints, such as delayed communications, limited supplies, and equipment malfunctions.

Crew Statements

"I'm proud of the crew's accomplishments over the past 200 days — facing each challenge with fortitude and finding new ways to improve our performance and efficiency daily."
— Ellen Ellis, Medical Officer

"We approach every day committed to doing our best work... What keeps us motivated is knowing that we're contributing directly to NASA's deep space exploration objectives."
— James Spicer, Flight Engineer

"Having limited resources... really bounds what you have to solve problems. Finding creative and clever solutions has been both challenging and rewarding."
— Matthew Montgomery, Science Officer

Expert Commentary

"The operational lessons learned, along with the detailed health and performance data this crew is providing, come at the perfect time to inform the development of a sustainable lunar presence and longer-term objectives for crewed Mars missions."
— Sara Whiting, Project Scientist and Mission Manager at Johnson for NASA’s Human Research Program

Background

CHAPEA missions are designed to gather data on cognitive and physical performance during extended isolation, simulating conditions for future deep space exploration. The data collected will directly inform mission planning, habitat design, and support systems for crewed missions to the Moon and Mars.