What is the engine in Orion spacecraft?

The Orion spacecraft is equipped with the Space Launch System (SLS) for its launch, but within the spacecraft itself, it utilizes the Orion Service Module, which is powered by a European Space Agency (ESA) built service module that includes a main engine based on the Apollo program's J-2 engine. This engine is designed for deep space missions and provides the necessary propulsion for maneuvers beyond low Earth orbit. Additionally, Orion has auxiliary thrusters for attitude control and orbital maneuvers.