Britannica AI Icon

Command Module

spacecraft
Also known as: CM

Quick Summary

The command module is a component of a spacecraft designed to carry the crew, communication equipment, and reentry systems. In the context of the Apollo program, the command module was one of three sections of the spacecraft, alongside the Service Module and the Lunar Module. It housed three astronauts during launch and was the only part of the spacecraft to return to Earth with the crew. The command module was constructed with an outer stainless-steel honeycomb shell for heat shielding and an inner aluminum honeycomb shell for pressure containment. It featured a reentry heat shield at its base and a window on its cone, and could be maneuvered using pitch, roll, and yaw engines. Inside, it contained an instrument panel, computer, environmental equipment, seating, and parachute storage. The command module was crucial for liftoff, landing, and the journey to and from the Moon.123

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Ask Britannica AI about this topic

Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.