Saturn I (also known as Cluster's Last Stand) was the name of the kind of rockets used by NASA in the Apollo program. Although German engineer and scientist Wernher von Braun intended it as the launch vehicle for crewed Apollo flights. NASA used the original Saturn I ten times and more often used a bigger version, the Saturn IB.
- "Saturn I". Encyclopaedia Astronautica. Retrieved 2019-05-21.
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