Artemis 2 astronauts train for emergencies with Orion spacecraft ahead of 2025 moon launch (photos)

An astronaut with a helmet visible in the round doorway of a spacecraft hatch, whose door is open showing gears and mechanics.

In case of emergency on Earth, open the spacecraft door.

The four Artemis 2 astronauts recently practiced a key contingency operation as they continue to prepare for their moon mission: opening the side hatch of their Orion spacecraft.

If all goes well during Artemis 2's planned September 2025 launch and round-the-moon mission, of course, the astronauts will keep all doors firmly shut. Conducting the first human lunar mission since Apollo 17 in 1972, however, requires a strict focus on safety — just in case.

The Artemis 2 astronauts are NASA commander Reid Wiseman, NASA pilot Victor Glover (who will become the first Black person to leave low Earth orbit, or LEO), NASA mission specialist Christina Koch (the first woman to do so) and Canadian Space Agency (CSA) mission specialist Jeremy Hansen (the first non-American).

Related: Artemis 2 astronauts simulated a day in the life on their moon mission. Here's what they learned (exclusive)

Artemis 2 astronaut Victor Glover, of NASA, training with a mockup door of the Orion spacecraft that will take him around the moon. (Image credit: Lockheed Martin)

NASA and the CSA announced the four astronauts in April 2023 for what was then supposed to be a December 2024 liftoff. The mission was delayed in January 2024 due to several critical engineering issues, particularly longstanding examinations of irregularities in the heat shield.

Artemis 2 astronaut Reid Wiseman (right), of NASA, looking at a mockup door of the Orion spacecraft alongside a technician. (Image credit: Lockheed Martin)

But the mission is a developmental one, the crew continues to emphasize, meaning that getting the hardware and crew safely ready must override any expectation of a firm schedule.

If all goes well with the launch, the astronauts will not touch the hatches, as the ground systems team at NASA’s Kennedy Space Center will secure the crew inside, NASA officials said in a statement on Wednesday (Oct. 23). During splashdown, recovery teams in the Pacific Ocean (including folks from both NASA and the U.S. Navy) will open the hatch.

Artemis 2 astronaut Jeremy Hansen (left), of the Canadian Space Agency, works with a mockup door of the Orion spacecraft. (Image credit: Lockheed Martin)

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The side hatch mockup — which crew members trained on with Orion spacecraft manufacturer Lockheed Martin Space in Littleton, Colorado — normally swings open using manual gearboxes. But in an emergency, the release mechanism has pyrotechnic (explosive) devices that "release the latch pins on the hatch instantaneously, allowing the hatch to open quickly," NASA stated.

Artemis 2 is the first crewed mission of NASA's Artemis program, which aims to establish a permanent human presence on and around the moon in the next decade or so. An uncrewed mission, Artemis 1, flew to lunar orbit and back in 2022. Humans will first land on the moon again with Artemis 3, which will fly in 2026 or so using SpaceX's Starship spacecraft to touch down.