The European Hardware Powering Artemis 2's Journey Around the Moon
When people envision Artemis 2, the first human flight to the Moon in over half a century, they often picture the cone-shaped Orion crew capsule atop NASA's Space Launch System rocket in Florida. But once Orion is in space, the mission becomes a story of international collaboration, with a critical component being the European-built Service Module (ESM).
As the prime contractor for the European Space Agency (ESA), Airbus built the ESM, often referred to as the spacecraft's 'powerhouse'. On Artemis 2, the ESM will provide essential functions like propulsion, electrical power, water, oxygen, and thermal control, enabling a four-person crew to survive and operate during a 10-day lunar flyby mission.
Power, Propulsion, and Survival in Space
The ESM acts as a combined engine room and life-support system for Orion. It features four solar array wings, each about seven meters long, generating approximately 11 kilowatts of electricity. This power is crucial for running spacecraft systems continuously and keeping the crew module supplied with energy in deep space.
Inside the ESM, 33 thrusters and engines are housed, including 24 reaction control thrusters, eight auxiliary engines, and one primary engine. These handle everything from fine course corrections to major burns that shape the lunar flyby and set up Orion's return to Earth. Additionally, the ESM manages thermal control, ensuring Orion's habitable volume remains within safe temperature ranges in the harsh environment of deep space.
The ESM also carries and provides essential consumables like water and oxygen for the crew, allowing Orion to function as an independent spacecraft far beyond low Earth orbit.
From Europe to Florida
The ESM is constructed at Airbus' facility in Bremen, Germany, before embarking on a transatlantic journey to the United States for testing and integration with Orion's crew module. This handoff process brings us to Florida, where major ESM components are delivered to NASA's Kennedy Space Center for final checks and mating with the spacecraft destined to carry astronauts around the Moon.
Airbus' presence on the Space Coast extends beyond Orion. Through its U.S. Space & Defense division, the company operates a small-satellite final assembly line for its ARROW satellite family on Merritt Island. While Airbus' Artemis work is global, the company maintains a significant operational footprint in Florida's space economy.
Airbus' Human Spaceflight Heritage
Airbus' involvement in Artemis 2 is rooted in a long tradition of multinational aerospace development. The company emerged from a European initiative to pool industrial capabilities across national borders, an approach that has since been applied to human spaceflight.
This experience includes programs like Spacelab, the Columbus laboratory of the International Space Station, and ESA's Automated Transfer Vehicle. These projects have contributed to the engineering and operational expertise behind the ESM, showcasing decades of incremental capability converging into a modern spacecraft element.
Artemis Beyond Artemis 2
The ESM is not a one-time contribution. ESA has contracted Airbus to build multiple service modules for Artemis missions, extending the partnership well beyond Artemis 2.
The first ESM was flown with an Orion spacecraft in late 2022 as part of the uncrewed Artemis 1 flight around the Moon. The service module for the Artemis 3 mission is currently being integrated with its Orion capsule in Florida. And in late 2025, Airbus completed the shipment of the service module for the Artemis 4 mission to Florida for integration and testing.
Artemis 2 is more than a single test flight; it's a demonstration that lunar exploration is now a complex systems-of-systems endeavor. American launch vehicles and capsules, European spacecraft infrastructure, and a globally distributed supply chain work together seamlessly.
