On July 2nd1969 and 2nd1,the American "Apollo 1 1" spacecraft landed on the moon successfully. When American astronaut neil armstrong set foot on the surface of the moon, he once said a sentence that was regarded as a classic by later generations-this is only a small step for me, but a big step for all mankind.

In order to realize manned landing on the moon, the United States first implemented four auxiliary plans, namely, launching nine "rover" lunar orbiters from 196 1 to 1965 to understand the possibility of Apollo spacecraft landing on the moon in the future. Five Explorer lunar landers were launched from 1966 to 1968 to understand the physical and chemical characteristics of lunar soil.

Extended data

There are a large number of huge impact craters on the front of the moon, which are filled with basalt lava flows from dark volcanoes, forming a vast plain called "Moon Sea". In fact, there is not a drop of water in the Moon Sea. There are bright and ancient plagioclase highlands and obvious impact craters between the periphery of the Moon Sea and the Moon Sea.

It is the brightest celestial body in the sky except the sun. Although it is very bright white, the surface is actually very dark, and the reflectivity is only slightly higher than that of old asphalt. Because the moon is very conspicuous in the sky, coupled with the regular changes in the phases of the moon, it has had a great influence on human culture such as myths and legends, religious beliefs, philosophical thoughts, calendar compilation, literature and art, customs and traditions.

Baidu encyclopedia-landing on the moon