China's Chang'e-4 probe soft-lands on moon's far side - Xinhua
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China's lunar rover travels about 448 meters on moon's far side
Source: Xinhua| 2020-04-30 11:33:44|Editor: huaxia
BEIJING, April 30 (Xinhua) -- China's lunar rover Yutu-2, or Jade Rabbit-2, has driven 447.68 meters on the far side of the moon to conduct scientific exploration of the virgin territory.
Both the lander and the rover of the Chang'e-4 probe have ended their work for the 17th lunar day, and switched to dormant mode for the lunar night due to the lack of solar power, according to the Lunar Exploration and Space Program Center of the China National Space Administration.
China's Chang'e-4 probe, launched on Dec. 8, 2018, made the first-ever soft landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3, 2019.
As a result of the tidal locking effect, the moon's revolution cycle is the same as its rotation cycle, and the same side always faces the earth. A lunar day equals 14 days on Earth, and a lunar night is the same length.
During the 17th lunar day, Yutu-2 continued its exploration to the northwest of the probe's landing site and obtained a new batch of scientific detection data.
Source: Xinhua| 2020-04-30 11:33:44|Editor: huaxia
BEIJING, April 30 (Xinhua) -- China's lunar rover Yutu-2, or Jade Rabbit-2, has driven 447.68 meters on the far side of the moon to conduct scientific exploration of the virgin territory.
Both the lander and the rover of the Chang'e-4 probe have ended their work for the 17th lunar day, and switched to dormant mode for the lunar night due to the lack of solar power, according to the Lunar Exploration and Space Program Center of the China National Space Administration.
China's Chang'e-4 probe, launched on Dec. 8, 2018, made the first-ever soft landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3, 2019.
As a result of the tidal locking effect, the moon's revolution cycle is the same as its rotation cycle, and the same side always faces the earth. A lunar day equals 14 days on Earth, and a lunar night is the same length.
During the 17th lunar day, Yutu-2 continued its exploration to the northwest of the probe's landing site and obtained a new batch of scientific detection data.
JSCh
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People's Daily, China✔@PDChina
Sunday is the 500th Earth day of the Chang'e-4 probe landing on the far side of the moon. The lander and rover of the Chang'e-4 probe have resumed work for the 18th lunar day on the far side of the moon after "sleeping" during the extremely cold night.
https://twitter.com/intent/like?tweet_id=1261903028438700032
2:15 PM - May 17, 2020
Sunday is the 500th Earth day of the Chang'e-4 probe landing on the far side of the moon. The lander and rover of the Chang'e-4 probe have resumed work for the 18th lunar day on the far side of the moon after "sleeping" during the extremely cold night.
https://twitter.com/intent/like?tweet_id=1261903028438700032
2:15 PM - May 17, 2020
JSCh
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Scientists Conduct Topographic Analysis and Mineral Retrieval based on Chang'e-4 Data
By LI Yuan | Jun 03, 2020
China's Chang'e-4 probe achieved the first soft landing within the South Pole-Aitken (SPA) basin, which is the oldest, largest, and deepest basin on the lunar farside. Technologies and software have been used in the Chang’e-4 mission for studies like lander localization, 3D terrain reconstruction, hazard recognition, and visual localization of the rover.
Researchers from the Aerospace Information Research Institute (AIR) of the Chinese Academy of Sciences (CAS) have long been engaged in developing advanced technologies of lunar rover localization and surface environment perception for the Chang'e-4 lunar exploration mission.
The researchers and their collaborators also carried out studies on topographic evolution analysis and surface mineral retrieval using images and spectral data acquired by the Yutu-2 rover.
According to their recent study published in Icarus, analysis via spectral unmixing revealed that the regolith at Chang'e-4 landing site has a forsteritic olivine and magnesium-rich orthopyroxene assemblage in almost equal fractions.
Surrounding topographic and geologic context indicated that the regolith is primarily the weathering products of Finsen crater ejecta. Because the SPA forming event should have thinned the lunar crust and might generate an impact melt pool, the provenance of regolith is likely a differentiated SPA impact melt pool or an Mg-suite pluton in the lunar lower crust.
Based on the data obtained by Chang'e-4, AIR researchers have unveiled more and more mysteries about the Moon.
Detailed topographic analysis of the landing site revealed the topographic evolution of the SPA and demonstrated that the surface material explored by the Yutu-2 rover was lunar deep interior material excavated from Finsen crater with possible contributions from Alder crater rather than the underlying mare basalt (Di et al., 2019).
Context map of Chang'e-4 landing site showing ejecta from Finsen and Alder craters (Image by AIR)
Spectral parameter scatter plots of in situ measured spectra by Chang’e-4 rover were in favor of a mixture of olivine-orthopyroxene minerals in the regolith. According to the surrounding topographic and geologic context, the regolith at Chang'e-4 landing site was primarily the weathering products of lunar deep-seated materials excavated from Finsen crater (Gou et al., 2019).
Spectral simulation revealed that the regolith was mature after billions of years' space weathering. Compared with the sub-mature regolith at Chang'e-3 landing site, the submicroscopic metallic iron abundance in the regolith at Chang'e-4 landing site did not vary significantly with distance from the lander (Gou et al., 2020).
The researchers also conducted high precision landing site topographic mapping using orbital, descent and rover images in the Chang'e-4 mission, resulting in DEMs and digital orthophoto maps of meter-level to centimeter-level resolutions (Liu et al., 2020; Wang et al., 2020).
Scientists Conduct Topographic Analysis and Mineral Retrieval based on Chang'e-4 Data----Chinese Academy of Sciences
By LI Yuan | Jun 03, 2020
China's Chang'e-4 probe achieved the first soft landing within the South Pole-Aitken (SPA) basin, which is the oldest, largest, and deepest basin on the lunar farside. Technologies and software have been used in the Chang’e-4 mission for studies like lander localization, 3D terrain reconstruction, hazard recognition, and visual localization of the rover.
Researchers from the Aerospace Information Research Institute (AIR) of the Chinese Academy of Sciences (CAS) have long been engaged in developing advanced technologies of lunar rover localization and surface environment perception for the Chang'e-4 lunar exploration mission.
The researchers and their collaborators also carried out studies on topographic evolution analysis and surface mineral retrieval using images and spectral data acquired by the Yutu-2 rover.
According to their recent study published in Icarus, analysis via spectral unmixing revealed that the regolith at Chang'e-4 landing site has a forsteritic olivine and magnesium-rich orthopyroxene assemblage in almost equal fractions.
Surrounding topographic and geologic context indicated that the regolith is primarily the weathering products of Finsen crater ejecta. Because the SPA forming event should have thinned the lunar crust and might generate an impact melt pool, the provenance of regolith is likely a differentiated SPA impact melt pool or an Mg-suite pluton in the lunar lower crust.
Based on the data obtained by Chang'e-4, AIR researchers have unveiled more and more mysteries about the Moon.
Detailed topographic analysis of the landing site revealed the topographic evolution of the SPA and demonstrated that the surface material explored by the Yutu-2 rover was lunar deep interior material excavated from Finsen crater with possible contributions from Alder crater rather than the underlying mare basalt (Di et al., 2019).
Spectral parameter scatter plots of in situ measured spectra by Chang’e-4 rover were in favor of a mixture of olivine-orthopyroxene minerals in the regolith. According to the surrounding topographic and geologic context, the regolith at Chang'e-4 landing site was primarily the weathering products of lunar deep-seated materials excavated from Finsen crater (Gou et al., 2019).
Spectral simulation revealed that the regolith was mature after billions of years' space weathering. Compared with the sub-mature regolith at Chang'e-3 landing site, the submicroscopic metallic iron abundance in the regolith at Chang'e-4 landing site did not vary significantly with distance from the lander (Gou et al., 2020).
The researchers also conducted high precision landing site topographic mapping using orbital, descent and rover images in the Chang'e-4 mission, resulting in DEMs and digital orthophoto maps of meter-level to centimeter-level resolutions (Liu et al., 2020; Wang et al., 2020).
Scientists Conduct Topographic Analysis and Mineral Retrieval based on Chang'e-4 Data----Chinese Academy of Sciences
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22:24, 11-Jun-2020
Chang' e-4 scientists win highest award by International Astronautical Federation
CGTN
Three Chinese scientists from the country's Chang' e-4 lunar landing mission team have won the highest award by the International Astronautical Federation (IAF) – the 2020 IAF World Space Award, the Chinese Society of Astronautics announced Thursday.
This is the first time that the honor is presented to Chinese aerospace scientists since the IAF was founded 70 years ago.
This year's award recipients are the chief designer and deputy chief designer of China's lunar exploration project Wu Weiren and Yu Dengyun, as well as Sun Zezhou, chief designer of the Chang' e-4 probe.
The IAF World Space Award is the Federation's most prestigious award. It has presented for an outstanding contribution in space science, space technology, space medicine, space law, or space management of exceptional impact on the world's progress in astronautics.
The Chang' e-4 probe made the first-ever soft landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3, 2019. The complete success of the Chang' e-4 mission has created another milestone in the lunar exploration history of humankind.
The mission has accomplished a series of important scientific discoveries and acquired geographic information on, among others, the topography, structure, and composition of the landing area.
It has also made discoveries that are of great scientific value for revealing the geographic evolution of the South Pole-Aitken Basin and early evolutionary history of the lunar crust. In addition, the mission has collected a lot of data and initial findings in areas such as neutral atoms, neutrons on the lunar surface, and low-frequency radio spectrums.
Led by the CNSA, the Chang' e-4 mission involves tens of thousands of scientists and engineers from across China and other team members from countries like Germany, Sweden, the Netherlands, Saudi Arabia, Russia, and Argentina. The Chang' e-4 probe was launched on Dec. 8, 2018. It took six years for its research, production, and launching preparation.
The Chang' e-4 mission team also received the only Team Gold Medal of the year awarded by the Royal Aeronautical Society of the United Kingdom last November, and the Moon Village Principles - Mission Prize by the Moon Village Association (MVA) at a symposium held in Tokyo in last December.
(With input from Xinhua.)
Chang' e-4 scientists win highest award by International Astronautical Federation
CGTN
Three Chinese scientists from the country's Chang' e-4 lunar landing mission team have won the highest award by the International Astronautical Federation (IAF) – the 2020 IAF World Space Award, the Chinese Society of Astronautics announced Thursday.
This is the first time that the honor is presented to Chinese aerospace scientists since the IAF was founded 70 years ago.
This year's award recipients are the chief designer and deputy chief designer of China's lunar exploration project Wu Weiren and Yu Dengyun, as well as Sun Zezhou, chief designer of the Chang' e-4 probe.
The IAF World Space Award is the Federation's most prestigious award. It has presented for an outstanding contribution in space science, space technology, space medicine, space law, or space management of exceptional impact on the world's progress in astronautics.
The Chang' e-4 probe made the first-ever soft landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3, 2019. The complete success of the Chang' e-4 mission has created another milestone in the lunar exploration history of humankind.
The mission has accomplished a series of important scientific discoveries and acquired geographic information on, among others, the topography, structure, and composition of the landing area.
It has also made discoveries that are of great scientific value for revealing the geographic evolution of the South Pole-Aitken Basin and early evolutionary history of the lunar crust. In addition, the mission has collected a lot of data and initial findings in areas such as neutral atoms, neutrons on the lunar surface, and low-frequency radio spectrums.
Led by the CNSA, the Chang' e-4 mission involves tens of thousands of scientists and engineers from across China and other team members from countries like Germany, Sweden, the Netherlands, Saudi Arabia, Russia, and Argentina. The Chang' e-4 probe was launched on Dec. 8, 2018. It took six years for its research, production, and launching preparation.
The Chang' e-4 mission team also received the only Team Gold Medal of the year awarded by the Royal Aeronautical Society of the United Kingdom last November, and the Moon Village Principles - Mission Prize by the Moon Village Association (MVA) at a symposium held in Tokyo in last December.
(With input from Xinhua.)
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Jun 16, 2020
CCTV Video News Agency
China's Chang'e-4 probe and Yutu-2 rover resumed work on Monday, Beijing time, after hibernating through the extreme cold of lunar night.
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China's lunar rover travels about 463 meters on moon's far side
Source: Xinhua| 2020-06-28 14:29:22|Editor: huaxia
BEIJING, June 28 (Xinhua) -- China's lunar rover Yutu-2, or Jade Rabbit-2, has moved 463.26 meters on the far side of the moon to conduct scientific exploration of the virgin territory.
Both the lander and the rover of the Chang'e-4 probe have just ended their work for the 19th lunar day, and switched to the dormant mode for the lunar night due to lack of solar power, the Lunar Exploration and Space Program Center of the China National Space Administration said on Sunday.
China's Chang'e-4 probe, launched on Dec. 8, 2018, made its first-ever soft landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3, 2019.
As a result of the tidal locking effect, the moon's revolution cycle is the same as its rotation cycle, and the same side always faces the earth. A lunar day equals 14 days on Earth, and a lunar night is the same length.
During the 19th lunar day, Yutu-2 examined a small crater about three meters southwest of the rover and obtained a new batch of scientific detection data.
Source: Xinhua| 2020-06-28 14:29:22|Editor: huaxia
BEIJING, June 28 (Xinhua) -- China's lunar rover Yutu-2, or Jade Rabbit-2, has moved 463.26 meters on the far side of the moon to conduct scientific exploration of the virgin territory.
Both the lander and the rover of the Chang'e-4 probe have just ended their work for the 19th lunar day, and switched to the dormant mode for the lunar night due to lack of solar power, the Lunar Exploration and Space Program Center of the China National Space Administration said on Sunday.
China's Chang'e-4 probe, launched on Dec. 8, 2018, made its first-ever soft landing on the Von Karman Crater in the South Pole-Aitken Basin on the far side of the moon on Jan. 3, 2019.
As a result of the tidal locking effect, the moon's revolution cycle is the same as its rotation cycle, and the same side always faces the earth. A lunar day equals 14 days on Earth, and a lunar night is the same length.
During the 19th lunar day, Yutu-2 examined a small crater about three meters southwest of the rover and obtained a new batch of scientific detection data.
JSCh
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Glistening 'Gel-Like' Substance on Far Side of The Moon Finally Identified
MICHELLE STARR
8 JULY 2020
A peculiar "gel-like" substance the Chinese Yutu-2 rover discovered in a small impact crater on the far side of the Moon last year has now been identified. According to analysis of the images, and comparison with Apollo samples here on Earth, it's exactly what you'd expect to find on the Moon: rock.
More specifically, it's rock that was melted together - likely in the heat of a meteorite impact - to form a dark green, glossy, glassy mass.
"Chang'e-4 rover discovered a dark greenish and glistening impact melt breccia in a crater during its traverse on the floor of Von Kármán crater within the South Pole Aitken (SPA) basin on the lunar farside," the researchers wrote in their paper.
"It was formed by impact-generated welding, cementing, and agglutinating of lunar regolith and breccia."
....
https://www.sciencealert.com/we-fin...like-substance-on-the-far-side-of-the-moon-is
MICHELLE STARR
8 JULY 2020
A peculiar "gel-like" substance the Chinese Yutu-2 rover discovered in a small impact crater on the far side of the Moon last year has now been identified. According to analysis of the images, and comparison with Apollo samples here on Earth, it's exactly what you'd expect to find on the Moon: rock.
More specifically, it's rock that was melted together - likely in the heat of a meteorite impact - to form a dark green, glossy, glassy mass.
"Chang'e-4 rover discovered a dark greenish and glistening impact melt breccia in a crater during its traverse on the floor of Von Kármán crater within the South Pole Aitken (SPA) basin on the lunar farside," the researchers wrote in their paper.
"It was formed by impact-generated welding, cementing, and agglutinating of lunar regolith and breccia."
....
https://www.sciencealert.com/we-fin...like-substance-on-the-far-side-of-the-moon-is
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