Apollo command and service module

The Command/Service Module (CSM) was one of the two spacecraft that were utilized for the Apollo program along with the Lunar Module to land astronauts on the Moon. It was also utilized as a ferry for the SkyLab program and for the Apollo-Soyuz Test Project where a CSM rendevoused in orbit with a Soviet Soyuz spacecraft.

The spacecraft, as its name suggests, consisted of 2 segments, the command module which housed the crew, and a service module that provided propulsion, electrical power and storage for various consumables required during a mission. The service module would be cast off and allowed to burn up in the atmosphere before the command module re-entered and brought the crew home.