Anatomy of the Saturn V Moon rocket
1 Launch Escape System
Thankfully it wasn’t needed, but this was there to whisk the Command Module to safety if the rocket failed on launch.
2 Command Module
The main crew compartment, where Collins remained while the others descended to the surface.
3 Service Module
An essential part of the Apollo spacecraft, it provided power, communications and life support, as well as propulsion.
4 Apollo spacecraft
The Saturn V’s all-important payload, this was the part that actually travelled to the Moon.
5 Lunar Module
This consisted of the crewcarrying ascent stage on top of the four-legged descent stage, which remained on the Moon.
6 Instrument unit
It may look small and insignificant, but this was the brain of the Saturn V – its guidance computer.
7 Third stage
The third stage was fired twice: once to enter Earth orbit and then again to push onwards to the Moon.
8 Second stage
Using liquid-hydrogen fuel, the second stage took over for another six minutes, getting close to orbital velocity.
9 First stage
The Saturn V’s kerosenefuelled first stage lifted it to an altitude of 68 kilometres (42 miles) in 165 seconds before falling away.
10 Main engines
A cluster of five rocket engines, each over five metres (16.4 feet) tall, was needed to lift the near-3,000-tonne giant rocket off the ground.