Apollo 15 embarked in July of 1971 and was the fourth mission in which humans walked on the moon. Two astronauts, Commander David R. Scott and LM (Lunar Module) pilot James B. Irwin, are shown during their 4 days on the lunar surface. Shortly thereafter, the Apollo 17 mission landed, in December of 1972, and would be the sixth and final mission in which humans would roam the moon. The photographs from the 17th mission include Commander Eugene A. Cernan, LM pilot Harrison H. Schmitt and CM (Command Module) pilot Ronald E. Evans. Some activities depicted in the collection of twelve images include; the retrieval of a film canister on the outside of a spacecraft, the preparation of a LRV (Lunar Roving Vehicle), collection of lunar samples and, of course, the overall exploration of the moon’s surface.