Traveling through time and space & Doing timey wimy stuff.

As of Month of January  2022, The CNSA –China National Space Administration CLEP- China Lunar Exploration Program  Belt and Road Initiative Lunar Mission……Chang’e-4 with Yutu two the Lunar rover still working exploring more than 1003.9 meters on the other side of the moon on the 103 Kilometers Diameter Von Karman Crater in which is least than two length by length fifty five Kilometers Hong Kong –Macau- Zhuhai Bridges …. Working Exploring the Crater on the other side of the Moon Chang’e Luna…. At the moment it’s resting till the next set of adventuring parameters is need..

As of the latest of the Change 4 lunar lander still constant working while Yutu 2 the lunar Rover takes a break after visiting it’ creative lunar rock art forming a Jade Rabbit snacking on lunar Carrot.  The latest scientific achievements of the Chang’e-4 neutral atom detector嫦娥四号中性原子探测仪最新科学成果……

​​As we all know, the earth has a strong global magnetic field. When the solar wind “invades” the earth, a huge protective umbrella, the magnetosphere, will form around the earth, blocking most of the solar wind. Due to the lack of this global magnetic field and dense atmosphere on the moon, the lunar surface is directly exposed to the deep space, and the solar wind and the earth’s wind can directly bombard the lunar surface, producing various effects. The current data from China’s Chang’e, Japan’s Moon Goddess, India’s Chandrayaan-1, and the US Interstellar Boundary Probe show that about 0.1-1% of the solar wind protons in the general area will be scattered by the lunar surface, and 10-20% of the solar wind protons will be scattered with the lunar surface. After the action, it is converted into energy neutral atoms, and most of the remaining will be injected into the lunar soil to produce lunar water. Although the moon does not have a global magnetic field, there are many magnetic anomaly areas scattered on the lunar surface, and the magnetic field strength on the lunar surface is about several hundred nT. It can block part of the solar wind from bombarding the lunar surface, and the reflectivity of solar wind protons increases significantly in large-scale magnetic anomalies. Detecting energy-neutral atoms can reveal the microphysical mechanisms of the interactions between the solar wind, the Earth’s wind and the lunar surface, revealing small-scale features.

Fig. 1 Chang’e-4 landed on the Von Karman crater in the South Pole-Aiken Basin on the far side of the moon. The yellow area is the magnetic anomaly, and the red arrow represents the direction of the solar wind bombarding the lunar surface on the dark side.

On January 3, 2019, Chang’e-4 landed on the Von Karman impact crater in the South Pole-Aiken Basin on the far side of the moon, and the Neutral Atom Detector (ASAN) on the Yutu-2 lunar rover was energy neutral to the lunar surface for the first time on the far side of the moon. Atoms (ENA) make observations. Based on the analysis of the ENA energy spectrum obtained by ASAN from January 11, 2019 to October 12, 2020, the study found that in most lunar days, the ENA differential flux on the morning side is higher than that on the dusk side; The analysis of the observation data of the Atom Detector and the ARTEMIS satellite during the same period found that the differential flux of ENA in different energy ranges on the morning side and the dusk side is positively correlated with the solar wind state parameters such as flux, density and dynamic pressure. This is the first time to calculate the electrostatic potential above the magnetic anomaly using the observation data of neutral atoms on the lunar surface, updating the understanding of the interaction between particles and the magnetic anomaly. The results have extensive reference value for the study of solar wind, terrestrial wind and celestial bodies without atmosphere and global magnetic field (such as asteroids or comets).

Fig. 2 The electric field of charge polarization caused by the motion of protons and electrons, the electric field direction is upward. 
The deceleration of solar wind protons is associated with magnetic anomalies.

       The research results were published in Astrophysical Journal Letters, an authoritative magazine in the industry. The first author of the paper is Wang Huizi, a doctoral student in the Interaction Group of the Magnetosphere and the Solar Wind at Shandong University. Zhang Jiang from the Planetary Science Research Group, and the co-authors of the paper are from Japan Aerospace Exploration Agency, Peking University, Space Center of Chinese Academy of Sciences, Institute of Earth Science of Chinese Academy of Sciences, etc.



       该研究成果发表于业内权威杂志Astrophysical Journal Letters,该论文的第一作者是山东大学磁层与太阳风相互作用课题组博士生王慧姿,通讯作者为山东大学磁层与太阳风相互作用课题组长史全岐教授和行星科学课题组张江老师,论文的合作者来自于日本宇宙航空研究开发机构、北京大学、中科院空间中心、中科院地球所等。

Materials provided by: Wang Huizi素材提供:王慧姿

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