人类通过登月飞行和宇宙探测器对各大行星的逼近观察,掌握各大行星和月球的最新资料,使人们对行星和月球的面貌有新的了解。月球:美国先后发射了17艘宇宙飞船探测月球,共有6次、12人登上月球,宇航员采回月岩、月土、月矿360多公斤,通过登月观察,人们发现月球的大气很稀薄,由于月球引力小,空气不断从月球 Humans’ observations of the major planets through the lunar flight and space probes have captured the latest information of the major planets and the moon, enabling people to have a new understanding of the appearance of the planet and the moon. The Moon: The United States has launched 17 spaceships to probe the moon. A total of six times and 12 people have landed on the moon. Astronauts have collected more than 360 kilograms of moon rocks, moon soil and moon mines. They observed that the moon’s atmosphere was very Thin, due to the small gravity of the moon, the air keeps rising from the moon