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The Apollo era exploration and decades of study of lunar samples laid a foundation of knowledge about Earth’s nearest neighbor and provided a cornerstone for planetary science. Apollo investigated the moon through its missions. From study of samples brought back to Earth by Apollo, scientists have used the data to construct much of the information we know about the moon such as size, age, and former life.
Jolliff, B., & Robinson. (2019). The scientific legacy of the Apollo program. Physics Today, 72(7), 44-50.