Showing posts with label space exploration. Show all posts

Friday, June 7, 2024

Chang'e-6 bags precious lunar sample in Earth-returning vehicle, US alone in 'space race' narrative: observers

China spacecraft Chang'e-6 first to collect samples from far side of the moon - BBC News

A picture of the Chang'e-6 lunar probe's lander and ascender vehicles on the surface of far side of moon taken by a mobile camera on June 3, 2024 Photo: Courtesy of the CNSA

Two days after lifting off from the moon's surface, the ascender of China's Chang'e-6 lunar probe completed a rendezvous and docking with the orbiter-returner combination, delivering the world's first lunar samples collected from the far side of the moon to the Earth-returning vehicle on Thursday afternoon.

The Global Times learned from the China National Space Administration (CNSA) on Thursday that the rendezvous and docking took place at 2:48 pm Thursday and the safe transferring of lunar samples at 3:24 pm. This marks the second time China has achieved a lunar orbit rendezvous and docking, following Chang'e-5.

After its epic lift-off from the far side of the moon on Tuesday morning, the ascender of Chang'e-6, carrying the lunar samples, entered the lunar orbit and carried out four orbit adjustments, per the CNSA.

When the ascender was about 50 kilometers ahead and 10 kilometers above the orbiter-returner combination, the orbiter andreturner combination used close-range autonomous control to gradually approach the ascender, completing the orbital rendezvous, according to mission insiders.

The orbiter's three sets of K-shaped grappling claws aligned with the three connecting rods on the ascender's docking surface, securely connecting the two devices by tightening the claws, precisely completing the docking.

After that, the container holding the precious samples from the far side of the moon was safely transferred from the ascender to the returner.

The Chang'e 6 orbiter and returner combination will next separate from the ascender and enter a lunar orbit waiting phase, preparing for a lunar-to-Earth transfer orbit control at an opportune time, according to the mission plan.

After undergoing key steps such as the lunar-to-Earth transfer and the separation of the orbiter and returner, the returner is scheduled to land with the lunar samples at the Siziwang Banner landing site in North China's Inner Mongolia Autonomous Region.

Open to cooperation with US

Chang'e-6 completed the world's first-ever mission of collecting samples from the far side of the moon and is on its way home. This is a historic step in humanity's peaceful use of space, Chinese Foreign Ministry Spokesperson Mao Ning said during a routine press conference on Thursday.

When commenting on reports of NASA's congratulations on the latest leap in China's decades-long moon exploration, Mao told the Global Times on Thursday that China is always open toward space exchanges and cooperation with the US.

The two sides established mechanisms such as the working group on Earth science and space science cooperation, and the China-US Civil Space Dialogue. At US request, the competent authorities of the two countries established a mechanism to exchange orbit data on each other's Mars probes to ensure long-term successful mission operation, according to the spokesperson.

There are, however, difficulties in China-US space cooperation at the moment, which are caused by US domestic legislation such as the Wolf Amendment that prevents normal exchanges and dialogue between Chinese and US space agencies, Mao said.

"If the US truly wants to push forward space exchanges and cooperation with China, it needs to take practical steps to remove these obstacles," Mao noted.

The achievements of China's ongoing Chang'e-6 moon probe mission thus far have evidently become a source of anxiety for the US amid the Western media's fabricated hot saga of the US-China space race, Chinese space observers said on Thursday.

When covering the ascender of Chang'e-6's lift-off from moon surface, US media outlet CNN reported on Tuesday that the successful return of the samples would give China a head start in harnessing the strategic and scientific benefits of expanded lunar exploration - an increasingly competitive field that has contributed to what NASA chief Bill Nelson calls a new "space race."

When asked which country would be the first to have a base on the moon, Keith Cowing, former American rocket scientist and current editor of NASAWatch.com, bluntly said that it might be China. "We (the US) are trying to get there first… but we will land next to them (China), roll down our window and say 'Hi, y'all, where do you want us to park our big lander'."

During the same interview with DW, David Ariosto, an American journalist and founder of Space Watch Daily, said that China has the edge at this point, but that could change.

The anxiety and sour grapes mentality are quite evident on the US side, Li Haidong, a professor at the China Foreign Affairs University, told the Global Times on Thursday.

When handling ties with China, the US is desperate to hold an absolute edge over China in all spheres including the space domain to deal with China's rapid development. The obstacles are rooted in this mentality, Li noted. "Strategically, the US is also unwilling to be on an equal footing with China in space. This mind-set is deeply ingrained and traditional, making it difficult to change. This is also an important factor."

US media and the head of NASA have repeatedly tried to stir up the US-China space race narrative, aiming to increase investment in the space sector and accelerating technological progress and related activities in space, Chinese observers said.

The US wants to create a scenario of mutual confrontation rather than cooperation, which has led to the so-called space race the US desires. However, at present, the conditions for such a race do not exist because China and other countries are not willing to participate. If only the US is invested in it, it can't be called a race. In the end, it becomes a one-sided effort by the US, they said.

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Developers disclose details of the Chang’e-6 cameraman on moon surface

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Chang'e-6 bags precious lunar sample in Earth-returning vehicle, US alone in 'space race' narrative: observers

China spacecraft Chang'e-6 first to collect samples from far side of the moon - BBC News

A picture of the Chang'e-6 lunar probe's lander and ascender vehicles on the surface of far side of moon taken by a mobile camera on June 3, 2024 Photo: Courtesy of the CNSA

Source link

Developers disclose details of the Chang’e-6 cameraman on moon surface

The picture of Chang’e-6 lunar probe’s lander and ascender on the surface of the far side of moon ...

Chang'e-6 demonstrates 'international style': Global Times editorial

When "Chang'e" left the image of sharing the beauty of the moon thousands of miles apart to the ...

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China makes history as it nails second landing on Moon’s far side

China makes history as it nails second landing on Moon’s far side
Video: https://x.com/i/status/1797082273982132735 HISTORY MADE: Chang’e-6 lands on far side of the moon to collect unique ... https://youtu....

Thursday, January 5, 2023

NASA chief’s hawkish remarks another pathetic attempt, exposes US own hegemony and colonial ambitions

Illustration: Liu Rui/GT m Illustration: Liu Rui/GT

Chinese experts battered the latest round of attacks from NASA chief Bill Nelson, saying his smearing remarks against China's space development are yet another ridiculous and pathetic attempt to hype the "China threat" theory to get more funding, which only exposes the US' own hegemonic and colonial ambitions.

In an interview with POLITICO, Nelson said the race to the moon between the US and China is getting tighter and the next two years could determine who gains the upper hand.

He warned that Beijing could try to "dominate" the locations they step foot on the lunar surface or even try to "keep the US out," while citing the Nansha Islands as an "example" to prove his point.

The remarks angered Chinese researchers and commentators who have repeatedly made clear that China's exploration of the moon is dedicated to the advancement of humanity.

"Being a former astronaut himself, it is pathetic that he would play the trick of a thief crying 'stop thief,'" Song Zhongping, a space analyst and TV commentator, told the Global Times on Tuesday.

It is an established fact written into the United Nations Outer Space Treaty and others that the moon does not belong to any country in the world, while the Nansha Islands are indisputably part of China's territory. Comparing these two shows that Nelson does not even understand international law or the Outer Space Treaty, Song noted.

Nelson's attempt in a way reflects the mentality that the US wants to colonize the moon and consolidate its own hegemony in space, analysts said, evident in the new space version of an "Enclosure Movement" of the Artemis program, which gathered "like-minded" partners such as Canada, Japan and Europe but excludes China and Russia.

Nelson's remarks failed even to convince its own scholars. Victoria Samson, Washington director of the Secure World Foundation, said she is dubious about the "moon brawl," noting that China, like the US, is a party to the Outer Space Treaty, which bars nations from making territorial claims on any celestial body, including the moon, POLITICO reported.

It will be difficult for any nation to maintain a long-term human presence in deep space, she said, which makes the claims more unrealistic.

Nelson's remarks followed US congressional approval to fund NASA with $24.5 billion in fiscal 2023, about half a billion dollars less than US President Joe Biden had requested.

While still expressing "confidence" that the next moon mission could happen as planned to send a crew into the moon's orbit by 2024, he admitted that the agency is "under intense pressure" because it has been forced, as a cost-saving measure, to reuse all the avionics inside the Artemis I capsule for Artemis II.

Huang Zhicheng, a Chinese expert in aerospace science and technology, told the Global Times on Tuesday that NASA, with a lot on its plate including the operation of the International Space Station, the Artemis program and deep-space exploration projects, is hyping the "China threat" theory to get more money, as the just-concluded Space Launch System is already years behind schedule and billions of dollars over budget.

There is still a huge gap in the budget and many problems to solve for the US' manned moon landing to succeed, Huang said.

Specifically, Boeing that is undertaking the rocket launch tasks for the Artemis program has a chaotic management and it is hard to get the tasks done on time. For another thing, the moon lander being developed by SpaceX is yet to achieve its designated progress, and if the lander cannot be completed successfully this year, it may further delay the entire project, Huang noted.

Publicly attacking China's space program has become routine for NASA in the past few months. In December, the NASA chief accused China of being "one of the very few nations" that would not be partners with the US and that it is being "very secretive" in terms of space programs. In September, Nelson accused China of lacking needed transparency over issues. In July, the NASA chief blatantly claimed that China is "trying to occupy the moon." In May, he said that China stole the US' space technology.

"These accusations fired by NASA are unfounded and unjustified," Song said. "China has always had a cooperative and open attitude in the space sector."

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Monday, May 17, 2021

China’s Zhurong sends back signals, marking success of Tianwen-1's landing on Mars

Tianwen-1 successfully landed on Mars Infographic: GT

A review of China’s Tianwen-1 Mars exploration mission

Tianwen-1, China’s first interplanetary expedition, has spectacularly conquered a new major milestone, with its lander-rover combination successfully soft-landing at the planned site in the southern part of a vast plain known as Utopia Planitia on Mars on early Saturday morning, Global Times learned from the China National Space Administration (CNSA).

Chinese President Xi Jinping sent warm congratulations and sincere greetings to the personnel involved in the Saturday feat.

Xi, also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, said in his congratulatory letter that this success marks a major step forward in the country’s interplanetary exploration, achieving a leap from Earth-moon system to the interplanetary one. Leaving the footprint of Chinese people on Mars for the first time marks another milestone of the country’s space industry development.

Xi also noted that the country will always remember the contributions and achievements of the participants of the mission, stressing that it is their courage to challenge and pursue excellence that has brought the country to a leading position in the world in terms of interplanetary exploration.

Screen of Beijing flight control center shows the landing site of Tianwen-1 on Saturday. Photo: Zhang Gaoxiang/ CNSA

According to the CNSA, Tianwen-1 probe lowered its altitude from the Martian parking orbit around 1 am Saturday, before its lander-rover combination separated with the orbiter around 4 am. The lander-rover combination then took another flight of three hours before its entry into Mars atmosphere.

The Chinese spacecraft, after entering the Mars atmosphere, spent around nine minutes decelerating, hovering for obstacle avoidance and cushioning, before its soft landing on the designated landing site at the Utopia Planitia, CNSA said.

The orbiter rose and returned to the parking orbit 30 minutes after the separation, to provide relay communication for the landing craft combo, the Chinese space agency said.

Photo: Coutersy of CAST Photo: Coutersy of CAST

CNSA underscored that it has conducted cooperation with a range of international aerospace organizations and countries including the Europe Space Agency, Argentina, France and Austria, throughout the implementation of its Tianwen-1 Mars mission.

The smooth landing of the Tianwen-1 probe marked that China has become the third nation that has achieved such a feat, following Russia and the US.

The successful touchdown of Tianwen-1 took place on the 295th day of its journey after it was launched and sent into planned orbit via a Long March-5 carrier rocket from Wenchang Spaceport in South China’s Hainan Province on July 23, 2020.

The whole entry, descent and landing (EDL) of Tianwen-1 took around 9 minutes, during which the speed of the craft was reduced from 20,000 kilometers per hour to zero, according to the China Academy of Space Technology (CAST) the developer of the lander-rover combo of Tianwen-1.

The EDL of the Chinese craft first involved an aerodynamic decelerating stage before it deployed parachute and variant thrust engine systems.

Timeline of China's first Mars exploration mission Infographic: GT Timeline of China's first Mars exploration mission Infographic: GT

Such an aerodynamic decelerating stage reduced the craft's speed by some 90 percent, and then the parachute stage helped it further decelerate to some 100 meters per second before the thrust engine systems were turned on to enable the craft to enter a hovering stage as it reaches some 100 meters above the surface, said Wang Chuang, the chief director-designer of the Tianwen-1 probe with the CAST.

“At the hovering stage, the six instruments on board the rover, including microwave sensors to determine speed and distance and optical cameras, were started simultaneously in order to ‘search for a safer’ spot for the soft landing,” he explained.

Chinese space industry insiders told the Global Times on Saturday that although Tianwen-1 has inherited mature hovering and obstacle avoidance technology from the previous Chang’e-3,-4, and -5 lunar probe missions, there are still plenty of new challenges in its Mars landing attempt.

Currently, the success rate of humanity’s Mars landings is only below 50 percent, and most failed attempts happened at the EDL stage. “It took an extremely accurate operation of a range of technology, including aerodynamic shape design, parachute and engine, to achieve [the] soft landing on Mars. There is no room for defiance of even one second on any single system,” Sun Zezhou, the Tianwen-1 designer-in-chief with the CAST, noted.

Photo: Coutersy of CAST Photo: Coutersy of CAST

Compared to the moon, Mars is first and foremost much further from Earth, which results in an inevitable communication delay of some 20 minutes. It means that Tianwen-1 is very much on its own in the landing process, CAST experts said.

Also, although the density of Mars’ atmosphere is only 1 percent of Earth’s atmosphere, it causes a more complicated environment for landing than a touchdown on the moon, as there is no atmosphere on the Earth’s closest celestial neighbor, they added.

“We did not have first-hand data on the Mars atmosphere… which means we were put in an entirely unknown environment. One can imagine the level of difficulty,” Chen Baichao, chief director-designer of the rover system with the CAST.

China has adopted a unique trajectory-elevation plan based on trim-wing design to resist the risks of uncertainty brought by the Mars atmosphere, according to the CAST.

Named after an ancient fire god of Chinese mythology, the 1.85-meter-tall and some 240-kilogram Zhurong Mars rover will then be deployed. It is designed to rove the planet for at least 3 Martian months, approximately 92 days on Earth.

Infographic:Global Times Infographic:Global Times

In total, six scientific payloads – a pair of navigation and terrain cameras, a multispectral camera, a Mars surface composition detector, a penetrating radar, a mast-mounted magnetometer and a Mars climate station – were installed on Zhurong to study the topography, geology, soil structure, minerals and rock types and atmosphere in the area.

To survive the notoriously harsh sand storm on Mars’ surface, speed of which could reach 180 meters per second, about three times stronger than that of a super typhoon on Earth, Chinese engineers have developed a new material for Zhurong, enabling it to resist dust stains and shake off the dust, if any, by vibration.

Also, when the Mars rover encounters complicated situations on its drive path, Chinese scientists will conduct a simulation test on Earth with a 1:1 Zhurong model in the lab first, before they send instructions to the rover, Global Times learned from the CAST.

The technology used in the landing is based on China's successful human spaceflight and lunar missions, Andrew Jones, a Finland-based space observer who follows China's space industry, told the Global Times. "They haven't tested this altogether, but they have had the experience of dealing with these technologies."

What China is doing in the Tianwen-1 expedition is “extremely challenging and impressive,” said Jones.

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