Is the moon the only comet on earth?

The moon is not the only comet on the earth, but the only satellite on the earth.

The moon, the name of the celestial body, is called the moon as seen by the naked eye. In ancient times, it was also called Taiyin, Xuantu, Chanjuan and Pan Yu. It is a satellite of the earth and the fifth largest satellite in the solar system. The diameter of the moon is about a quarter of that of the earth, and its mass is about one-eighty-first of that of the earth.

The moon is the largest satellite known to earth, and its surface is covered with craters formed by the impact of small celestial bodies. The average distance between the moon and the earth is about 384,400 kilometers, which is about 30 times the diameter of the earth.

Extended data:

The moon revolves around the earth and rotates at the same time, with a period of 27.438+066 days, which happens to be a sidereal moon, so we can't see the back of the moon. This phenomenon, which we call "synchronous rotation" or "tidal locking", is almost a universal law in the satellite world of the solar system.

It is generally believed that it is the result of long-term tidal action of satellites on the planet. The libration is a wonderful phenomenon, which enables us to see 59% of the moon. There are mainly the following reasons:

1. In different parts of the elliptical orbit, the rotation speed does not match the revolution angular speed.

The intersection of the white road and the equator.

Baidu Encyclopedia-Moon