Artist's view of Artemis: Orion and the European Service Module as they separate from the second stage after launch on a Space Launch System rocket to the Moon.
ESA’s European Service Module is powering the Orion spacecraft to the Moon and back. 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.