<human>:  What is the difference between a Saturn V and a Delta IV rocket?
<bot>: The Saturn V is a three-stage liquid-fueled super heavy-lift launch vehicle used by NASA between 1966 and 1973. It was developed to support the Apollo program for human exploration of the Moon, and was later used to launch the Skylab space station. In comparison, the Delta IV rocket is a two-stage, liquid-fueled expendable launch system developed by The Boeing Company for the US Air Force. The Delta IV was designed to provide payloads with greater mass and volume to a variety of orbits, including geosynchronous transfer orbits, and launch interplanetary spacecraft.