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Thread: China's Chang'e 4 mission

  1. #91
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    Quote Originally Posted by schlaugh View Post
    Uh....selv? You know that’s animation, right?
    You are correct. It was published on the of 2nd January
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  2. #92
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    Ex-astronaut Dr. Leroy Chiao, on "What China's moon landing means for US".

    https://edition.cnn.com/2019/01/07/o...iao/index.html

    China started out the year by doing something that no nation has done before: It landed a spacecraft and an accompanying rover on the far side of the moon with an ambitious scientific payload package and an exciting mission ahead to study the interior structure of the moon with the help of ground-penetrating radar, among other things.

    Almost equally impressive from a technical standpoint, China successfully placed a communication relay satellite into a lunar halo orbit to enable the command of, and communication with, both the spacecraft and rover, which do not have line-of-sight views of Earth for direct radio contact.

    I had mixed feelings about these events.
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  3. #93
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    "Why the Moon's far side looks red in new images".

    http://www.planetary.org/blogs/guest...ed-images.html

    The first ever images taken from the surface of the far side of the moon have been released following the Chinese National Space Administration’s (CNSA) successful landing there. The lander Chang'e 4 and rover Yutu 2 follow from Chang'e 3 and the original Yutu rover that were deployed on the moon’s near side in 2013.

    But if you’ve been looking closely at the pictures, you could be forgiven for thinking that the far side of the moon is red. That’s how it looks on the unprocessed pictures – and it’s different from other pictures of the moon, in which it appears grey. So what is going on?

    Cameras on spacecraft often don’t see colours in the same way as the human eye. For example, the red, green and blue components are usually recorded separately. This was the case with the latest images, and no colour correction has been applied to take account of the different sensitivities of each set of the camera’s colour detectors.
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  4. #94
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    The International payloads carried by Chang'e-4 have started operation. The interesting tit bit in the report to me, was that NASA and CNSA are cooperating on this mission

    http://www.xinhuanet.com/english/201..._137734090.htm

    NASA of the United States has also discussed cooperation in lunar and deep space explorations with CNSA. The two sides has collaborated on the study of the landing of the probe.

    NASA has offered the orbital data of its Lunar Reconnaissance Orbiter (LRO) and the Chinese side has provided the landing timing and location, it said.
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  5. #95
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    My thinking is that part of Jade Rabbit's mission is to find water ice, at which point China's man-on-the-moon program goes into high gear. IMHO.
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  6. #96
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    Quote Originally Posted by Roger E. Moore View Post
    My thinking is that part of Jade Rabbit's mission is to find water ice, at which point China's man-on-the-moon program goes into high gear. IMHO.
    We might have hints of that soon, as Yutu-2 has woken up from its siesta

    http://www.spacedaily.com/afp/190110....0lom8ses.html

    China's lunar rover got back to work on the far side of the moon Thursday after waking from a five-day hibernation, its official social media page announced.
    "Afternoon nap is over, waking up and getting moving," the Yutu-2 (Jade Rabbit-2) posted on the Twitter-like Weibo.

    The rover on Saturday went into standby mode to protect itself from temperatures reaching towards 200 degrees Celsius (390 degrees Fahrenheit), the China Lunar Exploration Program under the China National Space Administration (CNSA) said.

    The 140-kilogram (308-pound) rover has since resumed activities, which will include taking a picture of the front side of the lander and exploration missions.
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  7. #97
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    China has released 2 more pictures, taken after Yutu-2 woke up from its siesta.

    https://qz.com/1520927/chinas-change...oons-far-side/

    Today (Jan. 11), the Chinese Lunar Exploration Project (CLEP) office released two pictures on social network Weibo (link in Chinese) of the far side of the Moon, one a panoramic shot, the other a top-down projection of the same area. The picture was taken by the Chang’e-4 spacecraft, which consists of a lander and a rover named Yutu-2, which is equipped with tools like a lunar-penetrating radar to explore the Moon’s material composition. In the picture, the Chang’e-4 lander is behind the Yutu rover.
    The 360-degree panorama above was pieced together from 80 photos.

    http://www.xinhuanet.com/english/201..._137736587.htm

    One of the published images is a 360-degree panorama which was pieced together from 80 photos taken by a camera on the lander after the rover drove onto the lunar surface, according to Li Chunlai, deputy director of the National Astronomical Observatories of China and commander-in-chief of the ground application system of Chang'e-4.
    The next picture shows how far Yutu-2 has travelled to date.

    http://www.xinhuanet.com/english/201..._137736620.htm

    The screen at the Beijing Aerospace Control Center shows the Chang'e-4 lander (R) and the Yutu-2 rover taking pictures for each other, Jan. 11, 2019.
    Last edited by selvaarchi; 2019-Jan-11 at 10:53 AM.
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  8. #98
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    See a two minutes forty seconds video of Chang'e-4 landing.

    https://gbtimes.com/heres-the-amazin...de-of-the-moon

    China has released amazing footage of the descent of the Chang'e-4 spacecraft which shows the historic moment of the first landing on the far side of the Moon.

    The Chang'e-4 spacecraft touched down on the far side of the Moon, which never faces the Earth, at 02:26 UTC on January 3, deploying the Yutu-2 rover 12 hours later, but this is the first full footage we've seen of the landing.

    The footage comes from the descent camera which initially gives a view ahead of Chang'e-4 over the 186-km-diameter Von Kármán crater, which contains the preselected landing site.

    The video shows how, as the craft descends, it is extremely difficult to visually gain any sense of distance to the surface before the landing.

    Andrew Jones on the 1st photos returned from Chang'e-4.

    https://gbtimes.com/first-lunar-far-...hange-4-lander

    The first panoramic images from the Chang'e-4 lunar mission were released on Friday offering the first look at the horizon from within the Von Kármán crater on the far side of the Moon.

    The image was taken using the Terrain Camera (TCAM) on the 1,200 kg Chang'e-4 lander. The spacecraft made the first ever landing on the far side of the Moon, which never faces the Earth, on January 3.
    Last edited by selvaarchi; 2019-Jan-12 at 12:40 AM.
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  9. #99
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    Quote Originally Posted by schlaugh View Post
    Uh....selv? You know that’s animation, right?
    The article from Planetary Society has the actual video.

    http://www.planetary.org/blogs/jason...-4-update.html

    Everything is going well 9 days after China's Chang'e-4 mission made a historic landing on the far side of the Moon, the country's space program said today. On 6 January, the Yutu-2 rover started a planned midday nap to avoid overheating while the Sun was directly overhead. Yesterday, it woke up and continued exploring its surroundings. Additionally, a fresh batch of images and video are revealing more about the mission's landing site within Von Kármán crater.
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  10. #100
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    NASA's Lunar Reconnaissance Orbiter (LRO), locates Chang'e-4 on the moon.

    http://www.leonarddavid.com/nasa-moo...anding-locale/

    NASA Lunar Reconnaissance Orbiter (LRO) imagery has been used to further pinpoint the landing locale of China’s Chang’e-4 farside lander.

    Looking at the just released Chang’e-4 descent frames to the surface made it easy to find the exact landing spot in a Narrow Angle Camera image produced by the Lunar Reconnaissance Orbiter Camera, or LROC. That image was taken prior to the Chang’e-4’s touchdown, explains Mark Robinson, the principal investigator of the LROC at Arizona State University in Tempe.
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  11. #101
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    THis report is about Chang'e-4 role to monitor the temperature of the Luna day and night. It also contains a one liner about Russia's contribution to the mission.

    http://www.xinhuanet.com/english/201..._137740516.htm

    Tan Mei, a consultant for the probe from CAST, said Chang'e-4 will switch to a "sleep mode" during the lunar night due to the lack of solar power, and rely on the radioisotope heat source, a collaboration between Chinese and Russian scientists, to keep warm.
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  12. #102
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    A string of news releases on Chang'e-4. The 1st one by BBC of the rover and the lander taking pictures of each other.

    https://www.bbc.com/news/science-environment-46836047

    A Chinese rover and lander have taken images of each other on the Moon's surface.
    "Chief designer of Chang'e-4 on challenges, countermeasures of soft-landing on far side of Moon" in Mandarin.

    http://www.cctvplus.com/news/2019011...ml#!language=1

    Storyline

    China adopted two means to enable the soft landing of Chang'e-4 on the complicated terrain on the far side of the Moon, said the chief designer of the probe on Monday.

    Sun Zezhou told a media briefing in Beijing how China achieved soft-landing on the far side of the Moon.
    "China's new lunar rover faces challenges on moon's far side"

    http://www.xinhuanet.com/english/201..._137743699.htm

    China's second lunar rover Yutu-2 (Jade Rabbit-2), which is the first ever rover to drive on the moon's far side, will face considerable challenges brought by complicated terrain in its future exploration, said Chinese space experts on Monday.
    "China's lunar exploration program to meet goal of sample returning by 2020"

    http://www.cctvplus.com/news/2019011...ml#!language=1

    China's lunar exploration program will have met the goal of orbiting and landing on the Moon and bringing samples back to Earth by 2020, said an official with China National Space Administration (CNSA) on Monday.

    Wu Yanhua, deputy head of CNSA and deputy chief commander of China's lunar exploration program, made the statement at a press briefing on China's lunar exploration program in Beijing.

    "China's lunar exploration program will have achieved the three-step objective of 'orbiting, landing and sample returning' by 2020. Since the program was launched after being approved by the Communist Party of China (CPC) Central Committee and the State Council in 2004, we have achieved five continuous successes -- the Chang'e-1, Chang'e-2, Chang'e-3, a test craft for Chang'e-5, and Chang'e-4," said Wu.
    "China committed to international cooperation in space program"

    http://www.cctvplus.com/news/2019011...ml#!language=1

    China has always been committed to international cooperation in its space program, an official with China National Space Administration (CNSA) said in Beijing on Monday.

    Wu Yanhua, deputy director of CNSA, told reporters at a news briefing on the Chang'e-4 mission that it has involved a lot of international cooperation.

    Wu, who is also deputy head of China Lunar Exploration Program, said, "China has always followed the principle of openness and cooperation in its space programs. The Chang'e-4 probe is equipped with 13 payloads, four of which are in cooperation with Germany, Sweden, the Netherlands and Saudi Arabia. It also takes a lunar micro-satellite Longjiang."
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  13. #103
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    Andrew Jones report includes the information that the silkworms were replaced by fruit flies.
    https://gbtimes.com/change-4-cotton-...-space-program

    Previous, widespread reports state that silkworm cocoons would also be involved. According to Quartz, citing a December report from Guancha, the team was originally planning to send silkworm cocoons but later opted for fruit flies instead.

    The species selection was according to strict requirements due to the limited size of the payload and the extreme conditions of the lunar surface. The animal and plant species selected were required to be able to withstand large swings in temperatures and radiation.
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  14. #104
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    Night, night, Chang'e-4. Sweet dreams till January 28th.

    https://spacenews.com/change-4-space...s-cooperation/

    The Chang’e-4 lander and rover have powered down for a first lunar nighttime on the far side of the moon following a successful landing and first set of surface activities.

    Nighttime began over the landing site in Von Kármán crater within the South Pole-Aitken Basin late Jan. 13 UTC, bringing an end to the mission’s first daytime.

    With the use of a Russian-developed radioisotope thermoelectric generator —an upgrade on the previous Chang’e-3 lander and rover mission and prototype for future deep-space exploration—the Chang’e-4 lander will be able to run at a low level of activity and will take soil temperature measurements.

    The Yutu-2 rover meanwhile will have folded it its solar panels and entered a sleep mode, relying on a radioisotope heater unit for the 14-Earth-day long lunar nighttime, when temperatures will plunge well below -100 degrees Celsius (-148 Fahrenheit).

    The lander and rover will resume their science and exploration activities following sunrise early Jan. 28.
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  15. #105
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    Good morning Chang'e-4.

    http://www.xinhuanet.com/english/201..._137789743.htm

    The rover and the lander of the Chang'e-4 probe have been awakened by sunlight after a long "sleep" during the first extremely cold night on the moon, the China National Space Administration (CNSA) announced on Thursday.

    The lander woke up at 8:39 p.m. Wednesday, and the rover, Yutu-2 (Jade Rabbit-2), awoke at about 8:00 p.m. Tuesday, surviving their first lunar night after making the first-ever soft landing on the far side of the moon, said CNSA.
    Brrrr it is cold up here.

    http://www.xinhuanet.com/english/201..._137789734.htm

    China's Chang'e-4 probe, having made the first-ever soft landing on moon's far side, found that the temperature of the lunar surface dropped to as low as minus 190 degrees centigrade, colder than expected.
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  16. #106
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    Change-4 and Yutu-2 will take their 2nd siesta on February 3rd.

    https://gbtimes.com/change-4-yutu-2-...-space-program

    The Chang'e-4 mission Yutu-2 rover is once again set to take a nap on the far side of the Moon to protect against high temperatures resulting from direct solar radiation.

    Yutu-2 awoke for its second lunar day in Von Kármán crater on January 29 after stopping activities on January 12 in preparation to endure temperatures which dropped to minus 190 Celsius (-310 F) during the nighttime.

    The rover will 'sleep' once again after just a few days of activity, but this time to escape the midday heat, which could raise the temperature on the sunlit side of the craft to over 100 degrees.

    The 140 kg rover will enter a protective standby mode on February 3, according the China lunar spaceflight social media account linked to the Chang'e-4 mission, as the rover does not have thermal self-regulation capabilities comparable to the 1,200 kg dry mass Chang'e-4 lander.
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  17. #107
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    China’s Longjiang-2 satellite has taken a full far side of the moon and earth is in the background.

    https://www.theverge.com/2019/2/5/18...cture-change-4

    A Chinese satellite currently in lunar orbit snapped this incredible image of the far side of the Moon, with a tiny Earth hanging out in the background. Captured on February 3rd, the picture offers a rare perspective of the Earth and Moon system together.
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  18. #108
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    Nearly as impressive as "Earthrise".

  19. #109
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    NASA's Lunar Reconnaissance Orbiter (LRO) spots Chang'e-4 lander.

    https://www.space.com/43252-china-fa...asa-photo.html

    China's history-making Chang'e 4 mission has been spied by one of its robotic moon-studying brethren.

    NASA's Lunar Reconnaissance Orbiter (LRO) recently caught a glinty glimpse of the Chang'e 4 lander, which on Jan. 2 became the first-ever spacecraft to make a soft touchdown on the moon's mysterious far side.
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  20. #110
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    Andrew Jones on a round up of what Chang'e-4 lander, Yutu-2 and Queqiao have done to date.

    http://www.planetary.org/blogs/guest...n-updates.html

    China has all but shut down to welcome the Year of the Pig and Yutu-2 is taking a precautionary midday nap, but the Chang’e-4 mission is still sending us some new and brilliant footage from its various spacecraft—while also being snapped by NASA’s Lunar Reconnaissance Orbiter.
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  21. #111
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    NASA's LROC has spotted the Chang'e lander and rover.

    http://lroc.sese.asu.edu/posts/1091

    On 30 January LROC acquired a spectacular limb shot centered on the Chang'e 4 landing site, looking across the floor of Von Kármán crater. At the time, LRO was more than 200 kilometers from the landing site so Chang'e 4 was only a few pixels across and the rover was not discernable. The following day LRO was closer to the site and again slewed (59° this time) to capture another view. This time the small Yutu-2 rover shows up (two pixels) just north of the lander. Also, shadows cast by the lander and rover are now visible.
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  22. #112
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    The lander and rover have gone to sleep fot the second time on Monday. Yutu-2 has now driven 120 meters to date. Slightly more that the 114.8 meters Yutu-1 achieved.

    http://www.xinhuanet.com/english/201..._137818637.htm

    [QUOTE]The lander and the rover of the Chang'e-4 probe have been switched to dormant mode for the lunar night after working stably during the past lunar day, the China National Space Administration (CNSA) announced Wednesday.

    The lander was switched to a dormant mode at 7:00 p.m. Monday as scheduled, and the rover, Yutu-2 (Jade Rabbit-2), at 8:00 p.m., said the CNSA.

    According to China's Lunar and Deep Space Exploration Center, the rover will be woken up on Feb. 28 and the lander on March 1.[QUOTE]
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  23. #113
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    Two power point presentations made on the 12th of February at he 56th session of UNOOSA's Scientific and Technical Subcommittee in Vienna. The 1st on Chang'e-4 and future of China's moon missions. The 2nd by Simona Zoffoli of the Italian Space Agency on "CSES Mission (China Seismo-Electromagnetic Satellite): Italy and China in Space".

    http://www.unoosa.org/documents/pdf/...9/tech-03E.pdf

    http://www.unoosa.org/documents/pdf/...9/tech-01E.pdf
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  24. #114
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    The landing site of Chang'e-4 has been given a name - Statio Tianhe

    http://www.xinhuanet.com/english/201..._137825242.htm

    The landing site of China's Chang'e-4 lunar probe has been named "Statio Tianhe" after the spacecraft made the first-ever soft landing on the far side of the moon last month.

    Together with three nearby impact craters and one hill, the name was approved by the International Astronomical Union (IAU), Liu Jizhong, director of the China Lunar Exploration and Space Engineering Center of the China National Space Administration (CNSA), said at a joint press conference.
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  25. #115
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    Good Morning Yutu-2

    http://www.xinhuanet.com/english/201..._137860566.htm

    The rover and the lander of the Chang'e-4 probe have resumed work after "sleeping" during their second lunar night on the far side of the moon.

    The lander woke up at 7:52 a.m. Friday, and the rover, Yutu-2 (Jade Rabbit-2), awoke at about 10:51 a.m. Thursday. Both of them are in normal condition, according to the Lunar Exploration and Space Program Center of the China National Space Administration.
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  26. #116
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    "China to open Chang'e-4 lunar probe data to world"

    http://www.globaltimes.cn/content/1140753.shtml

    China will gradually open data collected by the Chang'e-4 lunar probe to the world, the country's lunar program chief designer said.

    Wu Weiren, an academician of the Chinese Academy of Engineering, made the statement in his capacity as a member of the 13th National Committee of the Chinese People's Political Consultative Conference, the country's top political advisory body, on the sidelines of its annual session, which opened on Sunday.
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  27. #117
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    Quote Originally Posted by selvaarchi View Post
    The lander and rover have gone to sleep fot the second time on Monday. Yutu-2 has now driven 120 meters to date. Slightly more that the 114.8 meters Yutu-1 achieved.

    http://www.xinhuanet.com/english/201..._137818637.htm
    It now has travelled another 7 meters.

    http://www.xinhuanet.com/english/201..._137873486.htm

    China's lunar rover has conducted scientific detection on some stones on the far side of the moon, which might help scientists find out whether they are from outer space or native to the moon.

    The rover Yutu-2, or Jade Rabbit-2, was sent to the Von Karman Crater in the South Pole-Aitken (SPA) Basin on the far side of the moon on Jan. 3 in the Chang'e-4 mission.

    Currently, the rover has traveled about 127 meters on the moon, and is taking a "noon break" as the temperature on the moon rises extremely high. It's scheduled to resume work on March 10 and switch to its dormant mode on March 13, according to the Lunar Exploration and Space Program Center of the China National Space Administration.
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  28. #118
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    3 of the women behind the Chang'e-4 mission.

    http://www.xinhuanet.com/english/201..._137878220.htm

    The moon has traditionally been associated with women, maybe because the menstrual cycle is roughly the length of the waxing and waning lunar cycle. Now China's lunar exploration program, named after the moon goddess Chang'e, is highlighting the contributions of female scientists and engineers.
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  29. #119
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    Andrew Jones on what Chang'e-3 and Yutu-2 have done since landing.

    http://www.planetary.org/blogs/jason...nar-day-3.html

    China’s Yutu-2 rover is continuing to make tracks on the lunar far side and has returned new images of rocks in its path inside Von Kármán crater, while the lander and rover continue with their science objectives.
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  30. #120
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    Yutu-2 expected to last more than 3 months. It has also traveled 163 meters to date.

    http://www.leonarddavid.com/chinas-f...n-design-life/

    China’s lunar rover Yutu-2, or Jade Rabbit-2, has driven nearly 540 feet (163 meters) on the Moon’s farside. Controllers on Earth expect the machinery to work longer than its three-month design life.

    Both the rover and the lander of the Chang’e-4 lunar probe switched to a dormant mode on Wednesday as the extremely cold lunar night fell, according to the Lunar Exploration and Space Program Center of the China National Space Administration (CNSA).
    Space News also carried the news with additional information of Queqiao (‘Magpie bridge’).

    https://spacenews.com/change-4-space...sign-lifetime/

    As the far side of the moon never faces the Earth, communication and data transmission between ground stations and the Chang’e-4 spacecraft has been facilitated by a relay satellite stationed in a halo orbit around the second Earth-moon Lagrange point.

    The Queqiao (‘Magpie bridge’) satellite earlier this month turned on a low frequency astronomy payload, the Netherlands-China Low-Frequency Explorer, for the first time. NCLE will gradually deploy its three five-meter-long antennae to make observations of the solar system and, potentially, signals from the cosmic ‘dark ages’.

    A laser ranging test involving an observatory in the southern Chinese province of Yunnan is expected to be carried out in March, targeting a laser retroreflector aboard the Queqiao satellite.
    Last edited by selvaarchi; 2019-Mar-15 at 11:36 AM.
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