On September 16, 2022, the first seminar on scientific research achievements of Mars exploration missions was held in Beijing in a combination of online and offline methods, aiming to strengthen the exchange of scientific research results of Tianwen-1.
Figure 1. Landform map of impact craters, concave cones, grooves and ridges in the Zhurong landing area
天问一号飞運騎遊達达3亿CNSA – China National Space Administration – ESA – European Space agency Belt and road initiative mars mission…first Mars exploration mission, Tianwen- Martian Probe OneAs of September 15, 2022, the Tianwen-1 orbiter has been in orbit for more than 780 days, and the rover has travelled a total of 1,921 meters, completed the established scientific exploration tasks, and obtained 1,480 GB of original scientific exploration data. The scientific research team has obtained rich scientific results through the research on the first-hand scientific data obtained independently by my country. Through a comprehensive study of typical landforms such as concave cones, barrier craters, and trenches distributed in the landing area, the important connection between the formation of the above-mentioned landforms and water activities has been revealed.
Fig. 2 Schematic diagram of the plate-like hard-shell rock rich in water-bearing minerals found in the landing area by Zhurong and its formation process under the action of groundwater
Through camera images and spectral data, hydrous minerals were found in plate-like hard-shell rocks near the landing area, proving that there has been a large amount of liquid water activity in the landing area since 1 billion years ago (late Amazonian period).
Combined with camera images and rover moving ruts and other information, it is found that the soil in the landing area has strong compressive strength and low friction parameters, which are related to water activity and experience sand erosion.
Fig. 4 Analysis results of Martian soil mechanical parameters in the landing area of Zhurong
These new results reveal the impact of Martian sandstorm and water activities on geological evolution and environmental changes, provide strong support for the conjecture that there was an ocean in the Martian Utopian Plain, and enrich human scientific understanding of Martian geological evolution and environmental changes. The relevant results have been published in authoritative academic journals at home and abroad such as “Nature Astronomy”, “Nature Geoscience”, “Science Advances”, “Science of China” and so on.
In addition, the scientific research team also used the detection data of Tianwen-1 to obtain a batch of data on the relationship between the density of rocks on the surface of Mars and the degree of surface erosion, the distribution of ions and neutral particles in the near-fire space environment, and the gravitational field of Mars. Excellent scientific results.
At present, the Tianwen-1 orbiter continues to carry out scientific exploration in the orbit of the remote sensing mission, continues to accumulate first-hand scientific data, and makes China’s contribution to mankind’s in-depth understanding of Mars.
More than One year ago on 24th November 2020, the Chang Zheng – Long March Five Carrier Rocket Launched away in CNSA – China National Space Administration China Wenchang spaceport launch, Change Five Lunar probe into orbit, opened up towards China – People’s Republic of China’s first celestial bodies sample return trip from Mons Rumker on the Lunar Surface of the moon New research achievements – Chinese scientists reveal the composition of lunar soil minerals and space wind at the landing site of Chang’e 5
The fourth phase of the lunar exploration project has been approved, and the basic production of Chang’e-6 products has been completed…… The CNSA- China National Space Administration announced yesterday that China- People’s Republic of China’s lunar exploration project has made new progress. The fourth phase of the lunar exploration project has been approved by the state and is progressing smoothly. According to sources, the fourth phase of the lunar exploration project includes the Chang’e 6, Chang’e 7 and Chang’e 8 missions, which will be implemented successively in the next ten years. Among them, Chang’e 6 is the backup of Chang’e 5, which has the function of sampling and returning, and will go to the far side of the moon to perform missions. The production of Chang’e 6 has basically been completed. Combined with the first visit of Chang’e 4 to the back of the moon, after the demonstration of engineers and scientists in the early stage, the back of the moon is also taken into consideration. ….
Via CNSA China Space Administration –CLEP China Lunar Exploration project management office
More than One year ago on 24th November 2020, the Chang Zheng – Long March Five Carrier Rocket Launched away in CNSA – China National Space Administration China Wenchang spaceport launch, Change Five Lunar probe into orbit, opened up towards China – People’s Republic of China’s first celestial bodies sample return trip from Mons Rumker on the Lunar Surface of the moon New research achievements – Chinese scientists reveal the composition of lunar soil minerals and space wind at the landing site of Chang’e 5
Chinese scientists discover new minerals on the moon for the first time The autumn 9th September 2022 today, on the eve of the traditional Chinese festival Mid-Autumn Festival, in which duration on the 10th towards 13th September 2022 the CNSA- China National Space Administration and the National Atomic Energy Agency jointly released the latest scientific achievements of Chang’e-5. Dong Baotong, deputy director of the National Atomic Energy Agency, announced at the launch event that the new mineral discovered by Chinese scientists on the moon for the first time was named “Chang’e Stone”. This is a major scientific achievement my country has made in the field of space science, and it is also a successful exploration of cross-industry and cross-professional cooperation between nuclear and aerospace.
▲The position of Chang’e stone in the sample
“Chang’e stone” is a phosphate mineral in the form of columnar crystals found in lunar basalt grains. The innovative team of CNNC Beijing Institute of Geology, through a series of high-tech means such as X-ray diffraction, isolated a single crystal particle with a particle size of about 10 microns from 140,000 lunar sample particles, and successfully deciphered it. its crystal structure. Confirmed as a new mineral by voting by the International Mineralogical Society (IMA) New Mineral Classification and Nomenclature Committee (CNMNC). This mineral is the sixth new mineral discovered by humans on the moon, and my country has become the third country in the world to discover new minerals on the moon after the United States and Russia.
▲Microscope photos of lunar samples
▲Scanning electron microscope photo of Chang’e stone and symbiotic minerals
On December 17, 2020, Chang’e 5 returned to Earth with 1,731 grams of lunar samples. The National Space Administration has completed the distribution of 152 lunar samples in four batches totaling 53,625.7 mg, and 98 applicants from 33 scientific research units have passed the application. The fifth batch of lunar samples is being reviewed and will be released according to procedures. The Chinese Academy of Sciences, the Ministry of Education, the Ministry of Natural Resources, China National Nuclear Corporation and other units have been approved to undertake lunar sample research work, and foreign scientists and students have also participated in the joint research. At present, the latest achievements have been made in magma differentiation, space weathering, helium-3 gas and bioenergy conversion, etc., which are useful for understanding the origin and evolution of the moon, exploring the effective use of lunar resources, and realizing “zero energy” extraterrestrial environment and life. The support system has important implications
▲Chang’e Stone Structure The National Space Administration and the National Atomic Energy Agency, as the competent government departments in China’s aerospace and nuclear fields, have always adhered to the principles of “innovative leadership, collaborative efficiency, peaceful development, cooperation and sharing”, adhering to the concept of peaceful use of space and peaceful use of nuclear energy , continue to be committed to the integration of aerospace technology and nuclear technology, continue to explore scientific frontiers in deep space exploration and nuclear technology applications, and make new contributions to promoting the development of science and technology, the emergence of scientific achievements and international cooperation. .
More than One year ago on 24th November 2020, the Chang Zheng – Long March Five Carrier Rocket Launched away in CNSA – China National Space Administration China Wenchang spaceport launch, Change Five Lunar probe into orbit, opened up towards China – People’s Republic of China’s first celestial bodies sample return trip from Mons Rumker on the Lunar Surface of the moon New research achievements – Chinese scientists reveal the composition of lunar soil minerals and space wind at the landing site of Chang’e 5
Predecessors have used orbital remote sensing data to conduct extensive research on the topography and material composition of the CE-5 landing area. Recently, a series of sample analyses have advanced the understanding of lunar chronology, late lunar volcanism, and magma evolution mechanisms. Different from large-scale remote sensing observation and fine sample analysis, in situ spectral detection can not only provide local background information of the sampling area, but also be beneficial to study the characteristics of lunar soil in undisturbed and disturbed states. The Lunar Mineral Spectrometer (LMS) carried by the CE-5 lander acquired the visible-infrared reflectance spectrum of the lunar soil, which provided important data support for the study of the material composition of the lunar soil and space weathering.
Researchers from the Key Laboratory of Solar Activity and Space Weather of the National Space Science Center of the Chinese Academy of Sciences (hereinafter referred to as the “Space Center”) used the Chang’e-5 LMS in situ detection data to analyse the material composition and maturity, spectral parameters and unmixing of the lunar soil at the landing site The study shows that the mafic minerals in the lunar soil are mainly clinopyroxene, which is consistent with the chemical analysis and orbital spectral analysis results of the CE-5 sample in the laboratory.
The optical maturity and submicroscopic iron (SMFe) of the lunar soil did not change significantly before and after the rocket purge and shovel sampling. This study provides spectral evidence that the lunar soil surface experienced rapid tillage and adequate mixing.
Figure 1: (A) The measured field of view of the LMS spectral data is shown in the red box. Panoramic cameras show images of (B) lunar soil and (C) rocks, respectively. (D) LMS reflectance spectrum curve.
The red box in Figure 1A shows the observation field of LMS spectral data, where D11 is the rock block, and D14-D16 are the lunar soil spectra after shovelling. The magnified images of lunar soil and rocks are shown in Figure 1B and C, and Figure 1D shows the reflectance spectrum curve after preprocessing such as radiometric calibration and thermal correction.
Through the spectral parameter map of the absorption features at 1 μm and 2 μm (Fig. 2A), it was found that with the increase of calcium content, the absorption positions of pyroxene at 1 μm and 2 μm moved to the long-wave direction, and the lunar soil and rocks at the CE-5 landing site For high-calcium pyroxene, this is further confirmed in the 1 μm absorption center and the ratio projection of the 2 μm to 1 μm absorption area (Fig. 2B).
In this study, the Hapke model and the sparse unmixing algorithm were used to invert the mineral composition and abundance of the in situ spectra. The inversion results were consistent with the analysis results of CE-5 samples and the inversion results of orbital remote sensing (Fig.
Figure 2: LMS in situ spectral composition analysis
Space weathering is a common phenomenon of spectral reddening and darkening caused by micrometeorite impacts and solar wind injection on non-atmospheric celestial bodies.
First, the maturity of the lunar soil at the CE-5 landing site was qualitatively analyzed by using the projection maps of the spectral slopes R950/R750 and R1600/R700 and R750 and R700 respectively (Fig. 3A, B). It was found that compared with the lunar soil at the CE-4 landing site, the The lunar soil in the CE-3 and CE-5 landing areas is relatively immature, which may be related to the fact that CE-3 and CE-5 landed on a young impact crater sputter carpet (<100 Ma).
This study further calculated the optical maturity (OMAT, Fig. 3C) and submicroscopic iron (SMFe, Fig. 3D) content, and found that there was no significant change in lunar soil maturity before and after the rocket purge, and before and after scooping, indicating CE-5 landing The lunar soil in the district has experienced an equivalent exposure history within the scooping depth (<3cm).
This result is consistent with the radionuclide analysis results of the Apollo drilling samples and the simulation results of the lunar soil tillage model. This study provides spectroscopic evidence that the lunar soil surface undergoes rapid tillage and adequate mixing.
Figure 3: LMS In Situ Spectral Maturity Analysis
Space weathering is a common phenomenon of spectral reddening and darkening caused by micrometeorite impacts and solar wind injection on non-atmospheric celestial bodies.
First, the maturity of the lunar soil at the CE-5 landing site was qualitatively analyzed by using the projection maps of the spectral slopes R950/R750 and R1600/R700 and R750 and R700 respectively (Fig. 3A, B). It was found that compared with the lunar soil at the CE-4 landing site, the The lunar soil in the CE-3 and CE-5 landing areas is relatively immature, which may be related to the fact that CE-3 and CE-5 landed on a young impact crater sputter carpet (<100 Ma).
This study further calculated the optical maturity (OMAT, Fig. 3C) and submicroscopic iron (SMFe, Fig. 3D) content, and found that there was no significant change in lunar soil maturity before and after the rocket purge, and before and after scooping, indicating CE-5 landing The lunar soil in the district has experienced an equivalent exposure history within the scooping depth (<3cm).
This result is consistent with the radionuclide analysis results of the Apollo drilling samples and the simulation results of the lunar soil tillage model. This study provides spectroscopic evidence that the lunar soil surface undergoes rapid tillage and adequate mixing.
上述研究成果
已成功发表于国际权威学术期刊
Earth and Planetary Science Letters上。
Via CNSA China Space Administration –CLEP China Lunar Exploration project management office
CNSA –China National Space Administration ….. Returning to the Television and media Screens on Youku Documentary Variety is Searching for the night returner the latest preview of the third season of “The Night Returning” is coming. Bao Shuo, the chief dispatcher of the Beijing Aerospace Flight Control Center, is about to show her night return story. In order to say “Beijing understands”, she repeatedly practiced a calm voice and more the ability to parallelize tasks, work hard to exercise, and hope to better stick to the post. One person’s experience condenses the efforts of generations of predecessors. Let’s witness her space dream together
Sampling of the lunar surface! 在380,000km外拍娃是一种的感觉 Controlling Chang’e-5 from the earth to “dig soil” on the moon, how difficult is this process? Bao Shuo, dispatcher of the Beijing Aerospace Flight Control Center, described it as like catching a doll 380,000 kilometers away, with an accuracy of 1 millimeter.
北京明白””Beijing understands”
Beijing understands that there are hundreds of people behind it In the live broadcast of China’s aerospace launch, the “Beijing understands” that the Beijing Flight Control Center received a report and answered was impressive. In fact, behind every “Beijing understands”, there are hundreds of “understands”. Behind every sentence “understood”, it is the space workers who ensure that every plan and every instruction is in place. Chinese Space engineers and Takionauts 24 hours guarding the home of space, paying tribute to China Aerospace- space Industry..
Bao Shuo, a “post-90s” girl, is the first female dispatcher at the Beijing Aerospace Flight Control Center. From “Chang’e 5” to “Tianwen No. 1”, the excellent completion of the mission has made many people remember this young but calm face. Bao Shuo said that every time She said the words “Beijing understands”, there was an extremely difficult responsibility behind it. #searching for Yeguiren… In the third season, see how the Beijing general dispatcher who ordered “Bafang” was made? I didn’t expect the working with of Takionauts to be like this. Bao Shuo, the first female dispatcher of the Beijing Center, said: “We are more like a big housekeeper, guarding our spacecraft and Takionauts on the ground.” The spacecraft is regarded as a child, and she refuses to rest until he sees a safe landing. It can be seen that the astronauts have a very deep affection for the spacecraft. I look forward to the launch of the program at 10:00 tomorrow morning….. on Youku and People’s Daily..
