How far is the moon from the earth?

The distance from the moon to the earth is 384400 kilometers.

The moon is the closest celestial body to the earth, with an average distance of about 384,000 kilometers. Light-year is a unit of distance in astronomy, not a unit of speed. It represents the distance that light travels in a year. The speed of light is 300,000 kilometers per second, and it can travel 25.92 billion kilometers a day, which is 365 times the length, that is, one light year.

This method of expressing distance by time is also used in daily life. For example, it is 450 kilometers from Chengdu to Chongqing, and you can walk 60 kilometers every day, so we say it is seven and a half days' journey from Chengdu to Chongqing.

The distance to the moon means that the average distance from the moon to the earth is 3.84× 105km (about 60RE), and the included angle between the orbital plane of the moon around the earth (namely the ecliptic) and the orbital plane of the earth around the ecliptic is 5.

Natural satellite moon

The moon is the only natural satellite of the earth, which may have been formed about 4.5 billion years ago. Shortly after the formation of the earth, there were several hypotheses about its origin. One hypothesis supported by more factual evidence was that it was formed by debris generated by a huge collision between the earth and the Martian-sized celestial body Teia. These debris gathered around the earth and formed the origin of the big collision.

19, 16 In May, the National Astronomical Observatory of the Chinese Academy of Sciences announced that the research team led by Li Chunlai, a researcher at the observatory, used the data of Chang 'e-4 to prove that there are deep substances mainly composed of olivine and low-calcium pyroxene in the Antarctic and the aitken Basin on the back of the moon. The international academic journal Nature published this important discovery online.

See Baidu Encyclopedia-Moon for the above contents.