Apollo 11, the first manned mission to land on the moon, consisted of two primary components: the Command and Service Module (CSM) and the Lunar Module (LM).

1. Command and Service Module (CSM):

- The CSM served as the living quarters and control center for the three astronauts throughout the mission.

- It consisted of the Command Module (CM), the astronauts' living space during launch, orbit, and re-entry. The CM was equipped with control systems, navigation instruments, and life support systems for the crew.

- The Service Module (SM) provided power, water, and oxygen to the CM. It also housed the rocket engine used to correct the spacecraft's trajectory and propel it back to Earth.

2. Lunar Module (LM):

- The LM was specifically designed to land two of the three astronauts (Neil Armstrong and Buzz Aldrin) on the moon's surface and provide them with a means of returning to the CSM in lunar orbit.

- It consisted of two stages: the Descent Stage and the Ascent Stage.

- The Descent Stage contained landing gear, engines, and fuel to slow the LM's descent to the moon's surface and land safely.

- The Ascent Stage served to lift the astronauts and lunar samples back to the CSM. It was equipped with an ascent engine and was jettisoned after serving its purpose.