Moon

Moon: There were more asteroid collisions than the number of craters on the Moon

cosmos Interesting science

The spots on the Moon are visible from the Earth. This is because of the many craters built on it. In its 4.5 billion-year history, meteorites, asteroids, etc., have made these craters here. A new study has been told that more asteroids have fallen here than the number of craters seen on the surface of the Moon today. This research says that the traces of many ancient and early collisions are almost not visible on the surface of the Moon because these collisions took place on the soft surface.

No marks due to soft surface
Researchers say that during the youth of the Moon, there was an ocean of magma spread over the entire satellite, which cooled and became solid. Whereas asteroids or meteors were falling on the surface of the Moon even when the magma had not cooled. For this reason, not all collisions were likely to create craters. Due to the soft landing, no traces of these collisions could be made. This is why the Moon as seen today does not match what it used to be around a billion years ago.

Different craters
“These giant collision craters are often thought to be collision basins that formed from the solidification of the Moon’s magma ocean about four billion years ago,” said Katrina Miljkovic, lead researcher of the study published in Nature Communications and a planetary scientist at Curtin University in Australia. Were. But if this were the case, then these craters would have looked different than those that formed later in the geologic history of the Moon.

Different types of evidence
The idea of ​​a global magma ocean on the Moon is not new. But researchers have studied the history of magma and asteroid collisions in-depth and attempted to create a timeline. In which, we also tried to incorporate what we know. There are many clues about what happened on the Moon after their formation, from solar system modeling to evidenced impact shocks on the rock samples from the Apollo missions.

Magma sea time
Several studies suggest that boiling lakes of magma may have existed on the Moon as far back as 200 million years ago. This research shows how this assumption coincides with how giant asteroid collisions may have occurred in the beginning. In different studies, the time of solidification of the oceans of magma of the Moon is different. But it could also be longer in history than the earliest collisions in the past of the Solar System.

Marks after surface solidification
Miljkovic says that with age, the surface of the Moon cooled and hardened and formed collision marks that became detectable even by remote sensing. This is very important, which helps determine how the solar system was developed, as it is. And from there, it can also be learned how the planets actually formed and how long they can stay in a given state.

Hard to find some information
There are many things in this matter which are difficult to ascertain. For example, how many asteroid collisions may have been missed in the earlier assessments while getting information about the Moon cannot be known. But this information will help improve models that show what happened billions of years ago.

Not only this, since the Moon is so close to the Earth, whatever happened there must have had an impact on Earth as well, giving us a better understanding of how our planet and life came into existence. Miljkovic said that the information from these investigations will be helpful in future research to understand the effects of the collision on Earth and its origin.