A look back at prior missions to the moon
The Artemis II mission, set to lift off as early as Wednesday and fly around the moon, is the latest chapter in a long history of lunar exploratory space missions launched by NASA over the last six decades.
In the same way that Artemis II serves as the first crewed spaceflight to test technology for future missions to the moon and Mars, Apollo 8, which launched on Dec. 21, 1968, was the first crewed spaceflight to reach the moon and also served as a lunar landing preparation mission, preceding Apollo 11's July 20, 1969, lunar landing.

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-ABC News' Mason Leib








