Four crew members who spent 378 days in isolation at NASA's Johnson Space Center in Houston have emerged from a simulated Mars mission, a test meant to help prepare for future human exploration of the Red Planet. The crew left their habitat on Saturday after more than a year inside the facility.

Ellen Ellis, the medical officer on the Crew Health and Performance Exploration Analog, known as CHAPEA, spoke at the center after emerging with her three crewmates. "It's been a hell of a year," she said, describing the group as analog astronauts living in what she called captivity of their own free will.

The four entered the 1,700-square-foot, or 158-square-meter, 3D-printed habitat on October 19, 2025. During the mission they carried out tasks meant to mirror the demands of life on Mars, including growing crops in simulated Martian soil. They also communicated with NASA officials while dealing with time delays that mimic those inherent in interplanetary communication.

NASA has explored Mars with robotic rovers and orbiting spacecraft, and the agency has set an ambition to send humans to the planet as early as the 2030s. Missions like CHAPEA are designed to study how people cope with confinement, limited resources, and communication lag over long periods, before astronauts face those conditions in space.

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