CHAPEA Mission (NASA): A 378-Day Martian Simulation

NASA is launching the second CHAPEA mission: a crew will spend 378 days inside Mars Dune Alpha to prepare for future human missions to Mars.

A Martian Mission… on Earth

On October 19, 2025, four carefully selected volunteers will enter Mars Dune Alpha, a simulated Martian habitat located at NASA’s Johnson Space Center in Houston. They will live and work there like real astronauts for 378 days, until October 31, 2026.

This experiment, called CHAPEA (Crew Health and Performance Exploration Analog), is designed to better understand the human challenges of long-duration missions to Mars and deep space.

Mars Dune Alpha: A 3D-Printed Martian Base

Built by the company ICON, Mars Dune Alpha is a 160 m² habitat constructed with 3D printing. It includes:

• private crew quarters,

• a kitchen and medical area,

• scientific workspaces,

• a gym,

• and an outdoor zone simulating the Martian surface for suited spacewalks.

The environment was designed to reproduce the constraints of life on Mars: isolation, limited resources, and simulated failures.

Not the First: CHAPEA 1 (2023–2024)

The mission starting in October 2025 is the second CHAPEA mission. The first, launched in 2023 in the same habitat, successfully concluded on July 6, 2024, after more than a year in isolation.

A third mission is already planned for 2027 to complete the series of analog experiments.

A Four-Person Crew

NASA has selected a crew with diverse backgrounds and complementary skills:

• Ross Elder (Commander) – U.S. Air Force test pilot, specialist in artificial intelligence and flight systems.

• Ellen Ellis (Medical Officer) – U.S. Space Force colonel, expert in GPS satellites and crisis management.

• Matthew Montgomery (Science Officer) – Electronics engineer, robotics and controlled-environment agriculture consultant.

• James Spicer (Flight Engineer) – Aerospace CTO, specialist in satellite communications and spacecraft design.

Two alternates have also been chosen:

• Emily Phillips – U.S. Marine Corps pilot.

• Laura Marie – Airline pilot and instructor, born in the United Kingdom.

The Challenges of the Mission

For over a year, the crew will face conditions close to those of a real Mars mission:

• Extreme isolation and confinement.

• Delayed communication with the outside world (up to 22 minutes).

• Limited resources (freeze-dried food, strictly rationed water and energy).

• Simulated failures and emergencies to manage without immediate help.

• Frequent simulated extravehicular activities.

A Unique Human and Scientific Experience

The program includes:

• Scientific research and simulated operations.

• “Martian” spacewalks in full suits.

• Growing a greenhouse garden to test food autonomy.

• Robotics experiments and space technology testing.

• Validation of new equipment, such as a potable water dispenser and diagnostic medical devices.

“CHAPEA and other Earth-based analogs help us determine which capabilities will best support future crews in facing the human challenges of a Mars mission,” explained Sara Whiting, scientist in NASA’s Human Research Program.

“The data collected will help us better understand the impacts of resource restrictions and extreme mission duration on crew health and performance,” added Grace Douglas, CHAPEA principal investigator.

CHAPEA 2 is not just a technical test: it is a full rehearsal of what the first human crew sent to Mars in the 2030s could experience.

Source

NASA’s dedicated page for this mission is [here]. Information about the participants is [here].