The reporter learned from the National Observatory of the Chinese Academy of Sciences on the 13th that using the high-resolution image data taken by Chang'e 6, the scientific research team led by researcher Li Chunlai of the station successfully constructed a high-precision terrain data set in the Chang'e 6 landing area. Not only did the landing point of Chang'e 6 accurately position the landing point of Chang'e 6, but also observed subtle features of the lunar surface, such as the roughness of soil particles, the specific shape of the crater, the thickness of the lunar soil, and the abundance of stones. Related research results were published in the journal Nature Communications.

　　In addition to the lunar samples brought back by Chang'e-6, the high-definition images of the landing area taken by it can help scientists understand the geological details and soil sources of the landing site. This information is like the "identity card" of lunar soil samples, which is crucial for subsequent laboratory research on lunar samples.

　　In this study, researchers used Chang'e-6 landing camera sequence images, panoramic camera close-up stereoscopic images and other data to construct a high-precision landing area terrain data set. The study found that the Chang'e-6 landing site is located on the southwest edge of the crater (C1 crater) with a diameter of about 51 meters, which belongs to the basalt area of ​​the moon seas. Through comparison, researchers found that the geological characteristics of the area's surface roughness, the proportion of crater depth, the thickness of lunar soil and the number of stones are between the Chang'e-4 and Chang'e-5 landing areas, indicating that the surface exposure time experienced by the area is roughly between the two.

　　The research found that the Chang'e-6 landing area is covered with meteorite impact sputtering traces, and multiple sputtering radiation patterns can be seen on the remote sensing image. It is calculated that the soil here is actually a "mixed formula". The local basalt about 35 cm thick (30%-35%) comes from the C1 pit near the landing area, and there are 5-16 cm thick foreign material, which may originate from craters further away.

　　This study provides a key scientific basis for the material source of Chang'e-6 lunar samples and lays the foundation for future lunar sample laboratory research and fine analysis. (Reporter Lu Chengkuan)

[Editor in charge: Zhu Jiaqi]