Beginning with Apollo 15, a small electric car was used to transport the astronauts across the surface of the moon. A total of twelve men walked on the moon, but after Apollo 17 in 1972, the program came to an end. The Saturn 5 booster constructed for Apollo 18 carried Skylab, America's first space station, into orbit. | Beginning with Apollo 15, a small electric car was used to transport the astronauts across the surface of the moon. A total of twelve men walked on the moon, but after Apollo 17 in 1972, the program came to an end. The Saturn 5 booster constructed for Apollo 18 carried Skylab, America's first space station, into orbit. |