service module
spacecraft compartment containing a variety of support systems used for spacecraft operations; equivalent to the spacecraft bus assembly on uncrewed spacecraft
spacecraft bus
general model on which multiple-production spacecraft are often based; infrastructure of a spacecraft, usually providing locations for the payload (typically space experiments or instruments); service module section of a spacecraft
European Service Module
component of the Orion spacecraft, designed by the European company Airbus Defence & Space for the Artemis program
Power and Propulsion Element
command and communications center of Lunar Gateway
Functional Cargo Block
part of the Soviet TKS spacecraft, and the basis for space station modules