User:Shelbystripes/Service module
From Wikipedia, the free encyclopedia
A service module is a component of modular manned spacecraft that may contain life support, power generation, and propulsion systems. Usually unpressurized, the service module remains attached to the pressurized manned capsule during a spaceflight mission and is jettisoned upon the completion of the mission, and usually burns up during atmospheric reentry. The service module is the equivalent to the spacecraft bus assembly on unmanned spacecraft.