Credit: National Air and Space Museum, Smithsonian Institution
The Saturn V had three stages. The first lifted the rocket off the ground to about 68 km (42 miles). The second stage carried it almost to orbit. And the third stage carried it into orbit and toward the Moon. The first and third stages of this Saturn V rocket were scheduled for the Apollo 18 mission that was cancelled. The second stage was a Skylab backup vehicle. The spacecraft was also meant to fly on a later Apollo mission. This Saturn V is therefore the only existing Saturn V with all flyable stages.
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Propulsion