Many wondered about the cause of the many craters that exist on the moon, especially since the planet we live on is much larger than the moon, so it is subjected to asteroids and meteorites that leave craters and craters from the impact of collision, yet we only know about 180 holes on the surface of the earth while We see several thousand craters on the moon’s surface .. The truth is that the Earth and the Moon have struck these space objects several times throughout their 4.5 billion years of history.
But if this is the truth, then why is only the surface of the moon what appears in this way, and where did all the craters of the Earth go?
According to the site “spaceplace.nasa“The main difference between the two is that the Earth has processes that can erase all evidence of the effects of the past. As for the Moon, any small hole on the Moon’s surface will remain there.”
There are three processes that help the Earth to keep its surface free from craters, and perhaps the first process is called erosion, and this is because the Earth has weather, water, and plants, which work together to break up the soil on the ground, and ultimately erosion in the hole can lead to almost nothing.
As for the moon, it has no corrosion because it has no atmosphere, and this means that it has no winds or weather, and certainly does not have plants, and almost nothing can remove the marks on its surface after they occur, so that there are still traces of dust for astronauts who were walking on the surface of the moon Fifty years, when the lunar surface vehicles were transformed by the Apollo mission to a historic landmark in Washington.
The second thing is called tectonics, which are processes that cause the formation of new rocks on the surface of our planet, the disposal of old rocks, and transformation over millions of years. Because of this process, the Earth’s surface is recycled several times throughout its long history.
Also, as a result, very few rocks on Earth were as old as rocks on the moon, and the moon had not been tectonic for billions of years, so there was no reconfiguration of the surface and everything remained the same.
As for the third thing, volcanoes, volcanic flows can cover the effects of craters, and this is a major way to influence craters elsewhere in our solar system, but it is less important than recycling crust here on Earth.
The moon once had large volcanic flows in the past that covered many of the largest previous impacts, but it remained without volcano about three billion years ago.
And despite the fact that the moon attracts fewer parts of space rocks from the earth, but the moon cannot do anything about it after it collides, and as soon as something reaches the moon, this event becomes the same as it is unlike the Earth that cleans this Gaps and their disappearance, so there are thousands of craters on the moon and there are no analogues on Earth.