New Insights into the Moon’s Near and Far Sides

A recent study published in the journal Nature Geoscience sheds light on the significant differences between the near and far sides of the Moon. This was achieved by analyzing rock and soil samples collected by the Chinese spacecraft Chang’e 6 from a large crater on the Moon’s far side.

Introduction and Significance of the Study

This study confirms previous findings regarding the age of the rocks, estimated to be around 2.8 billion years old. It also analyzed the chemical composition of the minerals, estimating that they formed from deep lunar volcanic lava at a temperature of approximately 1100 degrees Celsius, which is 100 degrees Celsius cooler than similar samples from the near side.

This discovery is part of scientists’ efforts to understand the significant differences between the Moon’s various sides, which have long been a subject of interest and study in the scientific community.

Differences Between the Near and Far Sides

Professor Yang Li from the Department of Earth Sciences at UCL and Peking University explained that there are substantial differences between the near and far sides of the Moon, both on the surface and internally. These differences are considered one of the Moon’s great mysteries, often referred to by scientists as the “two-faced Moon.”

The far side of the Moon is characterized by a thicker, more mountainous crust with craters, and appears to have been less volcanically active, with fewer dark basalt patches formed from ancient lava.

Heat-Producing Elements and Their Effects

The study indicates that the far side of the Moon may be cooler due to a lack of heat-producing elements such as uranium, thorium, and potassium, which release heat through radioactive decay.

These elements are part of a material known as KREEP, which scientists expect to be evenly distributed across the Moon, but they are more concentrated on the near side, explaining the greater volcanic activity there.

Impact of Past Cosmic Events

Some theories suggest that the distribution of heat-producing elements may have changed due to a major cosmic event, such as an asteroid or planetary body impact on the far side, affecting the distribution of heavy materials across the Moon.

There are also theories that the Moon may have collided with a smaller moon in its early history, leading to thermal differences between the sides.

Conclusion

This study provides an in-depth look at the significant differences between the Moon’s sides and a potential explanation for their causes. By analyzing new samples, scientists have provided conclusive evidence that these differences are not only superficial but extend into the Moon’s interior. These discoveries open the door for further research and exploration to better understand the Moon’s history and nature.