Four crew members of NASA's simulated Mars mission have left their isolation habitat at the agency's Johnson Space Center in Houston after 378 days, a project designed to help prepare a possible future crewed expedition to Earth's neighboring planet.
The team entered the 3D-printed habitat of 1,700 square feet (158 square meters) on October 19, 2025, and carried out tasks including growing plants in simulated Martian soil and communicating with NASA officials with delays meant to recreate those inherent in interplanetary communications.
"It's been a crazy year: analog astronauts living in captivity by our own free will," said Ellen Ellis, medical officer for the Crew Health and Performance Exploration Analog (CHAPEA) mission, speaking at the Johnson Space Center after leaving with her three crewmates.
The other crew members were mission commander Ross Elder, science officer Matthew Montgomery and flight engineer James Spicer.
NASA, which has explored Mars with robotic rovers and orbiting spacecraft, has the ambition of carrying out a crewed mission to Mars as early as the 2030s, with prior plans to send astronauts back to the Moon for the first time since 1972.
"We have an increasingly narrow window of opportunity to maintain American preeminence in space," Ellis said. She mentioned the military academy for space-related operations pursued by President Donald Trump's administration and plans for a lunar base. "Let's take the initiative, lead with science that benefits our economy and guarantees our legacy in space for our children's children," she said.
"In the case of Mars, the risks are great," Elder said after leaving isolation. "But thanks to the pursuit of knowledge, a solid vision and leadership, creativity, fortitude, hard work and an incredible base, the goal of taking humans to Mars is not only achievable, but rather inevitable."
The crew will take part in two weeks of post-mission evaluations and briefing sessions with NASA scientists. The agency has said it wants to learn what astronauts need to adapt to the routines and demands of daily life on long-duration missions away from Earth, so they can stay healthy, productive and connected.
This was NASA's second CHAPEA mission, following one in which a crew of four remained isolated at the Johnson Space Center for 378 days during 2023 and 2024.
Vanessa Wyche, director of the Johnson Space Center, welcomed the crew members as they came out of isolation. Wyche said they managed to live with limited resources, maintain their habitat and carry out simulated Mars operations. She also highlighted how the crew handled simulated interplanetary communications, with delays between sending messages and receiving replies.
"These delays demand patience, careful planning and greater independence, qualities that will be essential for future astronauts traveling millions of miles from home," Wyche said. Wyche noted that the lessons learned from the CHAPEA crew and their experiences will help pave the way for the first missions to the Moon and, "one day, to Mars."
Sources: La Vanguardia.