A four-member NASA crew emerged on 31 October 2026 from a 378-day simulated Mars mission at the Johnson Space Center in Houston, Texas. The Crew Health and Performance Exploration Analog (CHAPEA) Mission 2 began on 19 October 2025 to collect data on human health and performance during long-duration spaceflight.
Mission conditions and crew
Mission Commander Ross Elder, Medical Officer Ellen Ellis, Science Officer Matthew Montgomery and Flight Engineer James Spicer lived in a 1,700-square-foot (158-square-metre) 3D-printed habitat. They grew crops, conducted simulated spacewalks and maintained the habitat while coping with limited resources, isolation and communication delays designed to mimic interplanetary missions.
Vanessa Wyche, director of the Johnson Space Center, greeted the crew and said lessons from the mission would inform future missions to the Moon and Mars. The crew is scheduled for two weeks of post-mission evaluations and debriefings with NASA scientists.
CHAPEA programme
CHAPEA Mission 2 was NASA’s second such mission. The first four-person crew completed a similar 378-day isolation at the centre between 2023 and 2024.
Important Facts for Exams
- Additive process: 3D printing builds objects from digital models by depositing, joining or solidifying material under computer control, typically layer by layer.
- Design flexibility: 3D printing can produce complex forms, including hollow parts and internal trusses, while using less material than hand construction.
- Exploration hazard framework: NASA's Human Research Program classifies exploration hazards as space radiation, isolation and confinement, distance from Earth, gravity fields, and hostile or closed environments.
- Mars communication latency: Mars–Earth radio signal travel time varies with planetary positions, taking roughly 3–22 minutes one way; crews therefore cannot hold real-time conversations with Earth.
