Matthew Montgomery, James Spicer, Ross Elder and Ellen Ellis stepped into open air on Oct. 31, 2026. Their arrival outdoors ended a mock expedition to Mars that had kept them inside for longer than a year. The four formed the crew of NASA's Crew Health and Performance Exploration Analog, or CHAPEA. After the mission wrapped up, the agency released a photograph of them standing together outside.

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NASA presents the exercise as groundwork for its next steps in human exploration. In its announcement, the agency said the crew's experience will shape the design of a future Moon Base and the planning of missions on Mars. The broader aim is to learn how people cope with long-duration stays.

Working without a quick answer from Earth

One condition the volunteers lived with was a lag in their communications. ScienceDaily, in an article drawn from NASA material, contrasts this with the International Space Station, where talking to the ground is close to immediate. Across the gap between Earth and Mars, radio messages take a noticeable time to arrive. As a result, the outlet says, a Mars crew may have to work through problems and surprises alone instead of waiting for direction from mission control.

A year of chores in a closed habitat

According to NASA, the four spent their time testing the habitat's systems, looking after crops and making limited resources last. They also carried out extravehicular activities, the term for tasks done outside a spacecraft or living module, which are commonly known as spacewalks.

That workload reflects what ScienceDaily identifies as a central difficulty of any Mars expedition. A small team must stay well and effective for a long stretch while sharing tight quarters and juggling meals, equipment and routine duties. NASA does not want to face that test for the first time in deep space. Instead it runs analog missions: controlled exercises on Earth that mimic chosen aspects of spaceflight so researchers can watch how participants react.

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