NASA astronaut, Christina Koch, Artemis II mission specialist, undergoes spacesuit checks inside the crew quarters suit-up room in the Neil A. Armstrong Operations and Checkout Building part of the Artemis II Countdown Demonstration Test at the agency’s Kennedy Space Center on Saturday, Dec. 20, 2025. For this operation, the Artemis II crew and launch team are simulating the launch day timeline including suit-up, walkout, and climbing in and out of the spacecraft. Through the Artemis campaign, NASA will send astronauts to explore the Moon for scientific discovery, economic benefits, and to build the foundation for the first crewed missions to Mars, for the benefit of all.

Image Credit: NASA