Neil Armstrong and Buzz Aldrin were the first men to walk on the surface of the moon, but they were not the last. That was Gene Cernan, the last mon to step off the lunar surface. In total there have been twelve men who have walked on the moon, all of whom had done so between 1969 and 1972, which is the most recent non- Michael Jackson moon walking. What the topic of the passage ? The topic of the paragraph is. What is the main idea of this passage?