Command Module:
* Also known as the "Columbia," the Command Module served as the living quarters and control center for the astronauts during the voyage to the Moon and the return trip to Earth.
* Shaped like a cone with a blunt end, it was about 10 feet (3 meters) in diameter at the base and 11 feet (3.4 meters) tall.
* It featured portholes for observation and a hatch for entry and exit.
* The Command Module also housed the navigation and guidance systems, communication equipment, and life support systems.
Service Module:
* Attached to the Command Module, the Service Module provided essential support during the mission.
* It contained the main rocket engine that propelled the spacecraft to the Moon and back.
* The Service Module also housed oxygen and hydrogen tanks for the fuel cells that generated electrical power.
* It contained water tanks and a waste management system.
Lunar Module:
* The Lunar Module, also known as the "Eagle," was designed specifically for the landing on the Moon.
* It consisted of two stages: a descent stage and an ascent stage.
* The descent stage provided the propulsion for landing and contained the landing gear.
* The ascent stage allowed the astronauts to take off from the Moon's surface and rendezvous with the Command Module in lunar orbit.
* The Lunar Module was lightweight, weighing only about 10,000 pounds (4,500 kilograms) at liftoff from the Moon's surface.
These components of the Apollo 11 spacecraft worked in conjunction to make the groundbreaking journey to the Moon possible, allowing astronauts Neil Armstrong and Buzz Aldrin to become the first humans to walk on the lunar surface.
