According to data from the Earth-Moon laser reflection experiment, the moon is 3.8 cm away from the Earth every year, and this process has been going on for billions of years. If you trace it forward at this speed, the Earth and the Moon were together about 1.5 billion years ago. However, the moon was formed about 4.5 billion years ago, which means the moon is currently far away from Earth, much faster than in the past.
According to the current speed of the moon, in another 600 million years, the size of the moon in the sky will be smaller than the sun. When we look at the moon again, we have not seen the sun's size, which makes it impossible for us to see total solar eclipse .
Recently, some scientists have discovered that it can reveal the long-term history of the moon gradually "distance". This study comes from reading signals from ancient rock formations on Earth. If this signal is used to calculate, the distance between the earth and the moon 2.46 billion years ago was about 60,000 kilometers between the two, but now it is 384,000 kilometers.
Some people believe that in ancient myths, the East and the West have descriptions of the sky. In ancient Chinese mythology, it is said that there is a pillar of heaven between heaven and earth, called Buzhou Mountain. Is it the moon close to the earth? Later, for some unknown reason, the moon continued to move away from the earth.
There are also scientists who speculated that the earth and the moon were originally one. Later, due to the impact of an asteroid, part of the earth was thrown into the universe, and finally condensed under the action of gravity, finally forming the current moon.
Some netizens said that the moon is far away from the earth, the earth is far away from the sun, the sun is far away from the center of Milky Way galaxy , and the Milky Way is far away from other galaxies (in the entire universe, only the Milky Way and Andromeda galaxies are close to each other). If you can't understand it, draw a few dots on the balloon and then blow the balloon. This is the phenomenon of universe expansion. In the end, all galaxies are far away from each other, so far away that they will never see each other.
Some people also questioned whether the moon will be away from a certain distance, and it will be closer to a certain distance every year, and then away from a certain distance? It has been like this for billions of years, but we cannot determine the mysterious power behind it, or the current human knowledge cannot explain this phenomenon.
