NASA’s Artemis I flight test will be the first integrated test of the agency’s deep space exploration systems: the Orion spacecraft, SLS rocket, and supporting ground systems.
ESA’s European Service Module will be powering the Orion spacecraft to the Moon and back, seen here in a cutaway view on top of the rocket.
The European Service Module – or ESM – provides for all astronauts’ basic needs, such as water, oxygen, nitrogen, temperature control, power and propulsion. Much like a train engine pulls passenger carriages and supplies power, the European Service Module will take the Orion capsule to its destination and back.