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China Outer Space Science, Technology and Explorations: News & Updates

China schedules Chang'e-5 lunar probe launch
(China Daily) 08:43, January 23, 2017

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File photo shows a Long March 3C (CZ-3C) carrier rocket carrying a lunar orbiter for the Chang'e-5 lunar probe stands on the launch pad at the Xichang Satellite Launch Center in Xichang city, Southwest China's Sichuan province, October 23, 2014. [Photo/IC]


China plans to launch the Chang'e-5 lunar probe at the end of November this year, from the Wenchang Space Launch Center in southern China's Hainan province, aboard the heavy-lift carrier rocket Long March-5.

The mission will be China's first automated moon surface sampling, first moon take-off, first unmanned docking in a lunar orbit about 380,000 km from earth, and first return flight in a speed close to second cosmic velocity, according to the China Aerospace Science and Technology Corporation (CASC).

"With a weight of 8.2 tonnes, the lunar probe is comprised of four parts: an orbiter, a returner, an ascender and a lander," said Ye Peijian, one of China's leading aerospace experts and a consultant to the program.

The lander will put moon samples in a vessel in the ascender after the moon landing. Then the ascender will take off from the moon to dock with the orbiter and the returner orbiting the moon, and transfer the samples to the returner.

The orbiter and returner then head back to the earth, separating from each other when they are several thousands kilometers from earth. Finally, the returner will reenter the earth.

The development of Chang'e-5 has entered the end of its flight model phase, and relevant work is proceeding smoothly, according to CASC.

China plans to fulfill three strategic steps with the launch of Chang'e-5, "orbiting, landing and returning."

The country also plans to launch the Chang'e-4 lunar probe around 2018 to achieve mankind's first soft landing on the far side of the moon, and to conduct an in situ and roving detection and relay communications at earth-moon L2 point, according to the China National Space Administration.

"The country plans to send robots to explore both lunar poles," said the administration's vice director Wu Yanhua late last year, adding that plans to send astronauts to the moon were also being discussed.

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China’s Growing Ambitions in Space
While Trump works to set out a new policy for NASA, China is set to conduct a record number of launches this year.

https://www.theatlantic.com/science/archive/2017/01/china-space/497846/

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In his inaugural address, President Donald Trump said that the United States stands “ready to unlock the mysteries of space,” but given that he has yet to outline his NASA policy, it may be months before the country learns what that means. Meanwhile, China is moving boldly ahead with its own space-exploration efforts, and with little ambiguity about its mission. The country recently announced it would conduct about 30 launches this year. The target, if met, would be a record for China. The country conducted 21 successful orbital-launch missions in 2016, and 19 the year before that. The output puts China in a close second behind the United States, which saw 22 successful launches, and ahead of Russia, which conducted 16.

And there’s plenty more to come, according to a recent report from the China National Space Administration (CNSA), a quinquennial document that lays out the country’s space goals for the next five years. The report, released late last month, said CNSA will launch in 2017 its first-ever cargo spacecraft, headed for the space laboratory launched last year. In 2018, CNSA aims to land a rover to the far side of the moon, a first for humankind. And in 2020, it plans to land a rover on Mars, a feat that has been attempted by Russia and other European nations, but only successfully accomplished by the United States.

“Our overall goal is that, by around 2030, China will be among the major space powers of the world,” Wu Yanhua, the deputy chief of the National Space Administration, said recently.

While the report doesn’t mention it, Chinese space officials have said they would put astronauts on the moon by the mid-2030s.

The report demonstrates the growing capabilities of a burgeoning space program, one that’s often overlooked in a domain of other spacefaring nations, particularly the United States. China’s military-run space program began to take shape in the mid-1950s, at the start of the space race between the U.S. and the Soviet Union. Its efforts would be repeatedly derailed by political turmoil inside the country. Experts say the program is a decade or so behind the leading spacefaring nations, but it’s no rookie. China is only the third country to put its own astronauts into space, and, with Americans launching to space on Russian rockets, it’s currently only one of two that retains that capacity.

China first sent an astronaut into space in 2003. Yang Liwei, a former fighter pilot, orbited the Earth for 21 hours inside a Shenzhou spacecraft, launched by one of the Long March rockets. The pace of exploration quickened from there. In 2007, a Long March rocket sent Chang’e-1, an uncrewed orbiter, for a 15-month rendezvous around the moon. In 2011, CNSA launched Tiangong-1, the first component for a prototype orbital laboratory like the International Space Station. A Shenzhou spacecraft carrying three astronauts, including China’s first female astronaut, Liu Yang, successfully docked with Tiangong-1 a year later. China returned to the moon in 2013, landing the country’s first lunar rover. CNSA lost control over its would-be space station in 2016, but a successor, Tiangong-2, launched not long after. In November, two astronauts spent 30 days aboard Tiangong-2, China’s longest crewed mission, to study how to live and work in microgravity. The Americans and the Russians have spent years learning about surviving in orbit on the ISS, but for the Chinese, this was pioneering work.


China’s space activities represent “goals that any ambitious space country would want to pursue,” says John Logsdon, a professor emeritus at George Washington University who founded the Space Policy Institute there in 1987. And though China’s space capabilities are significantly behind those of the United States and Russia, particularly in deep-space exploration, experts say they’re about on par with Europe’s. (China and Russia have the technology to send people into space, while the U.S. doesn’t—at least until SpaceX and Boeing successfully test their NASA-sponsored Commercial Crew programs.)

But there’s no space race, Logsdon says, despite some of the headlines that tend to emerge whenever China launches anything.

Space exploration has always been as much a quest for geopolitical gain as it has for scientific discovery. The Americans and the Russians carried out launch after launch in the middle of the century not, first and foremost, for the sake of science, but in the name of national identity. China’s civilian and military space programs—and their motivations—are inextricably linked. Some analysts say it can be easy to overstate the influence of the Chinese People’s Liberation Army on space activities, and point out that the scientists and engineers on the civilian side are like scientists and engineers at NASA. But there is no solid delineation between the two. China’s ambitions in space are as strategic as the Vostok and Apollo programs of the 1960s.

“When you are the first country to land a probe on the far side of the moon, that says something about your science and technology, that says something about your industry,” says Dean Cheng, a senior research fellow at the Heritage Foundation, a conservative think tank in Washington, D.C., and one of the few Chinese-speaking analysts in the U.S. that focus on China’s space program. “It says something about what you can achieve that in turn is going to affect how countries view China when it comes to terrestrial issues, whether it’s border disputes, whether it’s building islands in the South China Sea, whether it’s Taiwan’s future.”

The Chinese government is notoriously secretive about both its civil and military space activities, but it has at times provided small glimpses of its work in the last decade. The Shenzhou 6 launch at the Jiuquan launch facility in 2005 was broadcast live. Foreign reporters were banned from attending the launch, and such access remains restricted. The same goes for private citizens, who are not likely to reach Jiuquan and other launch sites, which are located in remote areas. For outsiders, understanding the country’s pursuits requires reading between the lines. Take CNSA’s recent mention of China’s efforts to improve its satellite remote-sensing system, for example. “That’s also called a spy satellite,” Cheng points out.

Such is the two-side nature of space exploration: A rocket can launch a capsule to the moon—or a bomb toward an enemy.


“If I can monitor the oceans for ocean salinity, I can learn a lot of stuff about climate change. I can also learn about ocean conditions that might help me find submarines,” Cheng said. “Synthetic aperture radar can see through clouds and see all sorts of things, whether it is geographic features or whether it is an armored battalion under camouflage.”

China has spent the last decade demonstrating its technological abilities in cislunar space, the area between the Earth and the moon, where satellites and space telescopes alike reside. The country now operates more satellites than Russia does, though both are bested by the U.S. Through its Chang’e program, named for the goddess of the moon, China has shown it can maneuver spacecraft around the moon and rovers on its surface. Such advancements may not seem particularly noteworthy to some American observers, but that perspective is misguided, says Paul Spudis, a scientist at the Lunar and Planetary Institute in Houston. NASA is planning to launch an uncrewed spacecraft to orbit the moon in 2018, but Spudis wishes the U.S. would put more focus and funding into lunar missions than it has.

“The reason we’re interested in going back to the moon was not to repeat Apollo, and that’s why this trite saying used sometimes—‘been there, done that’—is really inappropriate because no one ever proposed to go back and redo what we’d already done in the 1960s,” Spudis says. “What we’re proposing to do is to go back to the moon to learn how to live and work productively on another world.”


China’s cislunar activities, particularly its crewed missions, are aimed at cementing its place as a major player in space. “Human space flight is generally recognized by scientists the world over to be the most expensive but least scientifically beneficial use of the human and fiscal resources national governments devote to space-related activity,” Gregory Kulacki, a senior analyst and China project manager at the Union of Concerned Scientists, an American nonprofit group, explains in an email. “The scientific benefits of crewed missions are small. But the geopolitical benefits are huge.”

For the same reason, American lawmakers in Congress have spent years telling NASA to get humans into space on its own—not for a desire for more scientific research, but because they don’t want to depend on Russia for the technology. Kulacki says Chinese scientists have told the government that robotic missions into deep space provide more scientific opportunities and cost less—but they’re not as flashy as a smiling spacewalker on the moon.

Not all of China’s cislunar activities have been as civil as launching a rover. In 2007, the country deliberately launched a projectile at one of its defunct weather satellites and blew it up, sending thousands of pieces of debris soaring through Earth’s orbit. The anti-satellite test was the first of its kind since 1985, when the U.S. launched a rocket at one of its satellites. China did not confirm the test had occurred until after Western news reports emerged. The government received a public dressing-down from the international community, but maintained it wasn’t seeking to weaponize space. In late 2014, China asked the U.S. to share information about possible satellite collisions, an unprecedented move that was welcomed by the American security community. According to U.S. defense officials, China has continued to conduct anti-satellite tests. None have scattered significant debris, but security officials and analysts remain wary.

Inside China, space activities, civil and military, are used to stoke nationalist sentiment. Public opinion data is nearly impossible to obtain, and if pollsters were asking the Chinese population about their priorities, they wouldn’t start with questions about the moon, Cheng says. Manufacturers mention the space program in their ads in an attempt to assure consumers of their product’s quality, a particularly sneaky tactic in a nation with significant lapses in quality control. Cheng said he once drank bottled water with a label bearing a tiny image of a Chinese astronaut and the message “water used on the Shenzhou.” (U.S. manufacturers did the same in the 1960s; sales for the powdered fruit drink Tang rose after commercials started mentioning that the Gemini astronauts drank it in space.)

“The Chinese government has certainly tried to use space as part of its arguments for de facto legitimacy,” Cheng says. “It is no accident that senior science leaders are consistently photographed at the launch of major missions.”

If there is a space race anywhere, experts say, it’s inside Asia—and it’s more of marathon than a sprint. India put a spacecraft into the orbit of Mars in 2014. South Korea is preparing for rocket launch tests in 2019. And Japan is aiming to send its first lander to the moon in 2019.

Perhaps the feeling of a race has always been felt most acutely inside nations, between scientists and political leaders. When the Russians sent Sputnik up in 1957, Mao Zedong decided the Chinese would launch their own satellite to space in 1959, the 10th anniversary of the People’s Republic of China and a favored target for the completion of many projects of the Great Leap Forward, the leader’s ultimately disastrous attempt to rapidly industrialize the country. Scientists knew this would be impossible with the technology they had, and the deadline came and went. China would not launch a satellite until 1970, and political pressures would take precedence over preparedness once more. The first satellite was planned to feature sophisticated, data-collecting instruments. But the directive from the top to scientists was to “get it up, follow it around, make it seen, make it heard,” according to a history on China’s space activities Kulacki wrote in 2009. In the end, the satellite could only play the first few bars of “East Is Red,” an instrumental song glorifying Mao and his Cultural Revolution, as it whirled around the Earth.
 
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China looks to Mars, Jupiter exploration
(Xinhua) 14:47, January 30, 2017

China's plans for deep-space exploration included two Mars missions and one Jupiter probe.

China plans its first Mars probe by 2020, said Wu Yanhua, vice director of the China National Space Administration.

A second Mars probe will bring back samples and conduct research on the planet's structure, composition and environment, Wu said.

Also on the agenda are an asteroid exploration, and a fly-by of the Jupiter system.

China aims to become a space power around 2030 with an advanced and open aerospace industry and space infrastructure.

Key aerospace projects currently planned by around 2020 include manned space programs, lunar probes, the BeiDou Navigation Satellite System and the Gaofen (High Resolution) observation satellite program, according to a white paper on space activities released late last year.


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China unveils top names for Mars spacecraft
2017-01-30 08:37 Xinhua Editor: Mo Hong'e

China has released a short list of eight names for the country's first Mars spacecraft, which is scheduled to launch by 2020.

The eight names-- "Fenghuang" (phoenix), "Tianwen" (questions for heaven), "Huoxing" (Mars), "Tenglong" (soaring dragon), "Qilin" (Kylin), "Zhuque" (rose finch), "Zhuimeng" (chasing dreams) and "Fengxiang" (flying phoenix), were the top names chosen from over 14,500 choices submitted through more than 35,900 proposals entered by people worldwide.

China plans to launch its first Mars spacecraft by 2020, which will orbit, land and explore the Red Planet.

Proposals were accepted from August last year.

The eight names were selected via a jury review and online polls.

The final choice will be announced around Space Day, April 24, according to a moon probe and space program center under the State Administration of Science, Technology and Industry for National Defence, which solicited the proposals.

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China's Moon-Sampling Mission Targeted for November

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(Space) China is working to launch a sample-return mission to the moon before the end of 2017.

The mission, known as Chang'e 5, will be the first to bring lunar material to Earth since the Soviet Union's Luna 24 spacecraft did so in 1976.

Liftoff of Chang'e 5 is scheduled to occur at the end of November, according to China's state-run Xinhua news agency. The robotic craft will ride atop China's Long March-5 booster, departing from the Wenchang Space Launch Center in southern China's Hainan Province.



Four-part probe

According to Chinese news services, the over-8-ton Chang'e 5 is comprised of four parts: an orbiter, a lander, an ascender and a "returner" (an Earth re-entry module).

The mission will be China's first automated moon surface sampling probe. After touching down, the lander will place lunar samples into a vessel in the ascender. Then the ascender will take off from the lunar surface to dock with the orbiter and the returner, which will be circling the moon together, and transfer the samples to the returner.

The orbiter and returner will then head back to Earth. The two craft will separate from each other far from Earth, with the returner module eventually re-entering and parachuting down to the planet's surface solo.



A history of lunar sample-return

If successful, the Chang'e 5 mission would be the first lunar sample return to Earth in more than 40 years.

The former Soviet Union successfully executed three robotic sample-return missions in the 1970s: Luna 16 returned a small sample (101 grams, or 3.6 oz.) from Mare Fecunditatis in September of 1970; in February 1972, Luna 20 returned 55 grams (1.9 oz.) of soil from the Apollonius highlands region; and Luna 24 retrieved 170.1 grams (6 oz.) of lunar samples from the moon's Mare Crisium (Sea of Crisis) for return to Earth in August 1976.

And NASA's Apollo astronauts brought more than 800 lbs. (360 kilograms) of lunar material to Earth over the course of six landed moon missions from 1969 to 1972.



Relay station

China plans to fulfill three strategic steps with the launch of Chang'e 5: "orbiting, landing and returning."

The first spacecraft of China's ambitious moon program, the Chang'e 1 lunar orbiter, was launched in 2007, and Chang'e 2 followed in 2010. Chang'e 3, which included a lander and a rover, was launched in December 2013 and successfully landed softly on the moon.

Also on the country's moon exploration schedule is the launch of the Chang'e 4 lunar probe around 2018.

Chang'e 4 is designed to make the first-ever soft landing on the far side of the moon. (The mission was originally scheduled to launch in 2015 but was delayed, in case you were wondering why it's lifting off after Chang'e 5.) China also plans to launch a robotic probe to a gravitationally stable location beyond the lunar far side known as the Earth-moon Lagrange Point 2, to relay communications from Chang'e 4 back to Earth, according to the China National Space Administration (CNSA).

"The country plans to send robots to explore both lunar poles," CNSA vice director Wu Yanhua said late last year, adding that plans to send astronauts to the moon were also being discussed, Xinhua reported.



Human exploration, too

Also last year, Tian Yulong, chief engineer of the State Administration of Science, Technology and Industry for National Defense (SASTIND), noted that "lunar exploration is endless."

Tian said that China is in discussion with the European Space Agency and other countries "to build bases and carry out scientific investigations on the moon, which will lay a technology and material foundation for human beings' landing on the moon in the future."


Source: Space

 
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China plans to launch its first Mars spacecraft by 2020, which will orbit, land and explore the Red Planet.

Great. I can't wait to see what new discoveries the lander will find.
 
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CNSA boss outlines China’s space exploration agenda
by Leonard David — April 5, 2017

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COLORADO SPRINGS — China is pushing forward on a number of space fronts, including milestone-making robotic missions to the moon, as well as scoping out an automated Mars sample-return mission by 2030.

Yulong Tian, secretary-general of the China National Space Administration (CNSA), spoke here April 5 during the 33rd Space Symposium.

CNSA is the governmental organization of People’s Republic of China responsible for the management of space activities for civilian use and international space cooperation with other countries.

Yulong reviewed major elements of China’s 2016 “Space White Paper” — a sweeping outline for the next five years of robotic and manned spaceflight, Earth and space science, and an emerging, new thrust in commercial space.

“China is currently making policy for commercial space activities,” Yulong said.​

Concerning China’s Beidou navigation system, “by 2020, 30 satellites can provide services for global users,” Yulong said.​

Yulong said China plans to orbit “more than 30” meteorological, ocean- and land-monitoring spacecraft in the coming decade.​

In reviewing China’s interest in working with other nations, Yulong said that the country has signed more than 100 space-cooperation agreements with 30 countries and space agencies, and in the future “intends to cooperate with governments around the world,” in climate change research, disaster prevention, space safety, and deep space exploration.​

China is developing plans for deep space exploration over the next decade that will involve Jupiter, Venus, and asteroid exploration.

On China’s manned space program agenda, Yulong said a cargo supply ship is being readied for launch aboard a Long March 7 rocket this month. It will auto-dock with the Tiangong-2 space lab currently orbiting Earth unoccupied, but the mission is a step forward in building and resupplying a larger space station in 2022, he said.

Yulong said that work remains underway to ready the Chang’e-5 lunar probe for an end of November liftoff from the Wenchang Space Launch Center in southern China’s Hainan Province. The moon-bound probe will be boosted by a heavy-lift carrier rocket, the Long March 5.

Chang’e-5 is China’s first automated moon surface sampling mission and consists of four parts: an orbiter, a lander, an ascender and a returner.

The lander will place samples of the moon in the ascender, which then departs the lunar surface to dock with the moon-circling orbiter and the returner. The samples are to be transferred to the returner for a journey back to Earth.

Also on China’s Moon exploration agenda, Yulong said, is the Chang’e-4 that’s slated to be launched in 2018. That probe is targeted to achieve the first-ever soft-landing on the far side of the moon, Yulong said.

Yulong said that China approved in 2016 a robotic Mars lander to be launched in 2020. A second step is a return sample from Mars by 2030, he said.

Asked about the challenges ahead in lobbing Mars samples back to Earth, Yulong expressed confidence.

“The Mars exploration for China…we have solved all the technical problems,” Yulong told SpaceNews.

“We’re on track,” he said, but added that the investment in the Mars sample effort is still being pursued.​

http://spacenews.com/cnsa-boss-outlines-chinas-space-exploration-agenda/#sthash.Yqj68D9A.dpuf
 
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Longlou aerospace town, in Wenchang
2017-04-20 13:10 | Ecns.cn | Editor:Yao Lan

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An aerial view of Longlou Town in Wenchang City, South China’s Hainan Province, April 14, 2017. Chinese officials have decided to develop the Wenchang Satellite Launch Center into a space industry base that will be known as the Hainan Wenchang International Aerospace City, in the previously little-known town. (Photo: China News Service/Luo Yunfei)

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An aerial view of Longlou Town in Wenchang City, South China’s Hainan Province, April 14, 2017. Chinese officials have decided to develop the Wenchang Satellite Launch Center into a space industry base that will be known as the Hainan Wenchang International Aerospace City, in the previously little-known town. (Photo: China News Service/Luo Yunfei)

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An aerial view of Longlou Town in Wenchang City, South China’s Hainan Province, April 14, 2017. Chinese officials have decided to develop the Wenchang Satellite Launch Center into a space industry base that will be known as the Hainan Wenchang International Aerospace City, in the previously little-known town. (Photo: China News Service/Luo Yunfei)

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An aerial view of Longlou Town in Wenchang City, South China’s Hainan Province, April 14, 2017. Chinese officials have decided to develop the Wenchang Satellite Launch Center into a space industry base that will be known as the Hainan Wenchang International Aerospace City, in the previously little-known town. (Photo: China News Service/Luo Yunfei)

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An aerial view of Longlou Town in Wenchang City, South China’s Hainan Province, April 14, 2017. Chinese officials have decided to develop the Wenchang Satellite Launch Center into a space industry base that will be known as the Hainan Wenchang International Aerospace City, in the previously little-known town. (Photo: China News Service/Luo Yunfei)


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Tianzhou 1, China's first cargo spacecraft, was launched from this area.

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Int'l coalition set up to promote space cooperation
(Xinhua) 09:03, April 24, 2017

XI'AN, April 23 -- A coalition was established Sunday in northwest China's Shaanxi Province to promote innovation and cooperation on space exploration under the the Belt and Road Initiative.

The coalition, set up in the provincial capital of Xi'an, encompasses 48 universities, research institutes and academic organizations at home and abroad. It was initiated by the Chinese Society of Astronautics and Xi'an-based Northwestern Polytechnical University.

Tian Yulong, secretary-general of China National Space Administration, said the alliance will boost exchanges on space innovation between its members and help joint training of high-caliber professionals.

China designated April 24 as Space Day last year to mark the anniversary of the country's first satellite launch Dongfanghong-1 in 1970.

Xi'an, home to more than 200 aerospace research centers and enterprises, will hold major celebrations on Monday.

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Commercial space center to take off
By ZHAO LEI | China Daily | Updated: 2017-04-25
Construction starts on first base for privately financed projects

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China's first man in space, Yang Liwei, compares his hand with his preserved print displayed at an exhibit about China Space Day at the National Museum of China in Beijing. JIANG DONG/CHINA DAILY


Construction began on Monday on China's first commercial space industry center in Wuhan, capital of Hubei province.

The Wuhan National Space Industry Base aims to attract at least 100 enterprises involved in the space industry before 2020 and generate 30 billion yuan ($4.36 billion) in annual gross product by then, according to China Aerospace Science and Industry Corp, the main investor. The center will occupy 68.8 square kilometers in Xinzhou district.

Expace Technology, a subsidiary of CASIC that provides commercial launch services, will invest 1.7 billion yuan to build production and assembly plants for solid-fuel carrier rockets for commercial launches. The company plans to make about 20 rockets at the center each year, it said in a statement.

In China, a commercial launch usually means a space launch financed by an entity other than a Chinese government or military agency.

The CASIC Second Academy will invest 300 million yuan to construct a research, development and manufacturing complex at the center to make small satellites. CASIC has said it will launch 156 small communications satellites into low Earth orbit, at an altitude of 160 to 2,000 km, before the end of 2025. They would form a network capable of global coverage.

Monday was the second China Space Day. On April 24, 1970, China launched its first satellite, Dongfanghong 1.

Also Monday, Expace Technology said it signed a contract with an unnamed domestic client to conduct four commercial launch missions in a week early in 2018.

The missions will employ Kuaizhou 1A, a solid-fuel carrier rocket developed by the CASIC Fourth Academy in Wuhan. The rocket has a liftoff weight of 30 metric tons and is capable of sending a 200 kg payload into a sun-synchronous orbit, or a 300 kg payload into a low-Earth orbit. Unlike most Chinese carrier rockets, it uses a transporter-erector-launcher vehicle rather than a fixed launch pad.

The first flight of Kuaizhou 1A, to launch three small satellites, was in January at the Jiuquan Satellite Launch Center in northwestern China.

CASIC Fourth Academy began to develop Kuaizhou solid-fuel rockets in 2009 as a low-cost, quick-response rocket family for the commercial launch market. It has launched three of the rockets.

Zhang Di, deputy director of the academy and chairman of Expace, said a new-generation Kuaizhou 11 is under development and will make its first flight before year's end.

He said Kuaizhou 11 will have a liftoff weight of 78 tons and will be capable of placing a 1-ton payload into a sun-synchronous orbit at an altitude of 700 km, or a 1.5-ton payload into a low Earth orbit at an altitude of 400 km.

@AndrewJin
 
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China's space telescope to see why black holes get "angry"
Source: Xinhua| 2017-05-25 21:03:47|Editor: Mengjie



BEIJING, May 25 (Xinhua) -- Black holes in space remain a mystery. One of their many secrets is why they get "angry". China will soon launch a space telescope in a bid to find out.

The Hard X-ray Modulation Telescope (HXMT), developed by Chinese scientists, will observe the black holes and neutron stars.

"Black holes will be the focus of our observation since they are very interesting, and can generate various types of radiation, including X-rays and high energy cosmic rays, as well as strong jets," says Zhang Shuangnan, the lead scientist of HXMT and director of the Key Laboratory of Particle Astrophysics at the Chinese Academy of Sciences (CAS).

Scientists are curious about what the black holes are doing. So far about 20 black holes have been found in our galaxy. "We hope our telescope can discover more black holes. We also hope to better observe the black holes already discovered," says Zhang.

A black hole is a region of spacetime showing such strong gravitational effects that nothing - not even particles and electromagnetic radiation such as light - can escape from inside it.

There are two kinds of these "space monsters": black holes of stellar mass and supermassive black holes. Black holes of stellar mass are thought to form when massive stars collapse at the end of their lifecycle.

After a black hole forms, it can continue to grow by absorbing mass from its surroundings. Some scientists believe that by absorbing gas and other stars and merging with other black holes supermassive black holes of millions of solar masses may form. There is general consensus that supermassive black holes exist in the centers of most galaxies.

Black holes are key to understanding the origins of time and nature of space and the ultimate destiny of the universe, scientists say.

Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation.

Matter that falls into a black hole can form an external accretion disk heated by friction, forming some of the brightest objects in the universe.

The first black hole was discovered in 1972. Named Cygnus X-1, it is about 6,000 light-years from Earth and is a strong X-ray source.

"If a black hole does nothing, it cannot be found. But if matter falls into a black hole, it is accelerated and heated during the process, emitting X-rays. Scientists may get to understand the characteristics of black holes through the X-rays," Zhang says.

Some times a black hole is calm, but other times it's very "bad tempered." When a black hole gets "angry", it generates very strong X-rays or gamma ray bursts or jet-flows, Zhang says.

Other countries have sent about a dozen X-ray satellites into orbit, but most are suitable for observing only relatively calm black holes. However, HXMT is suitable for observing angry black holes and neutron stars, Zhang explains.

"We will scan the galaxy to track the 'tempers' of black holes. We are still not clear why some black holes suddenly get angry, since we haven't observed them for long enough," says Zhang. "We plan to make a thorough survey of the black holes and neutron stars in the galaxy."

Xiong Shaolin, a young scientist at the Institute of High Energy Physics of CAS, says the research will push forward the development of astronomy. "We hope to take X-ray photos of black holes in the future."
 
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China launches advanced satellite navigation positioning system
Source: Xinhua| 2017-05-27 23:24:23|Editor: Liu



BEIJING, May 27 (Xinhua) -- China on Saturday launched a national satellite navigation and positioning system. It is the largest in the country and boasts the widest coverage.

Li Weisen, deputy director of the National Administration of Surveying, Mapping and Geoinformation, said that the system consists of 2,700 base stations, a national database center and 30 provincial level database centers.

The system, featuring faster speed, higher accuracy and wider coverage, will be compatible with other satellite navigation systems, such as the BeiDou Navigation Satellite System and Global Position System (GPS), Li said.

According to the administration, the system is able to provide positioning service to transportation, emergency medical rescue and city planning and management.
 
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China's space telescope to survey Milky Way

Source: Xinhua | 2017-05-28 09:12:01| Editor: Yamei

BEIJING, May 28 (Xinhua) -- Many black holes and neutron stars are thought to be hidden in the Milky Way. Since they don't emit visible light, or are covered by dust, only X-ray telescopes can find them.

China will soon launch its first X-ray space telescope, the Hard X-ray Modulation Telescope (HXMT), with the aim of surveying the Milky Way to observe celestial sources of X-rays.

"Our space telescope has unique capabilities to observe high-energy celestial bodies such as black holes and neutron stars. We hope to use it to resolve mysteries such as the evolution of black holes and the strong magnetic fields of neutron stars," says Zhang Shuangnan, lead scientist of HXMT and director of the Key Laboratory of Particle Astrophysics at the Chinese Academy of Sciences (CAS).

"We are looking forward to discovering new activities of black holes and studying the state of neutron stars under extreme gravity and density conditions, and the physical laws under extreme magnetic fields. These studies are expected to bring new breakthroughs in physics," says Zhang.

Compared with X-ray astronomical satellites of other countries, HXMT has larger detection area, broader energy range and wider field of view. These give it advantages in observing black holes and neutron stars emitting bright X-rays, and it can more efficiently scan the galaxy, Zhang says.

The telescope will work on wide energy range from 1 to 250 keV, enabling it to complete many observation tasks previously requiring several satellites, according to Zhang.

Other satellites have already conducted sky surveys, and found many celestial sources of X-rays. However, the sources are often variable, and occasional intense flares can be missed in just one or two surveys, Zhang says.

New surveys can discover either new X-ray sources or new activities in known sources. So HXMT will repeatedly scan the Milky Way for active and variable celestial bodies emitting X-rays.

Zhang says other countries have launched about 10 X-ray satellites, but they have different advantages and therefore different observation focuses.

"There are so many black holes and neutron stars in the universe, but we don't have a thorough understanding of any of them. So we need new satellites to observe more," Zhang says.

The study of black holes and neutron stars is often conducted through observing X-ray binary systems. The X-ray emissions of these binary systems are the result of the compact object (such as black hole or neutron star) accreting matter from a companion regular star.

By analyzing binary system X-ray radiation, astronomers can study compact objects such as black holes or neutrons stars.

How do the black holes or neutron stars accrete matter from companion stars? What causes X-ray flares? These are questions scientists want to answer, and China's new space telescope might help.

Lu Fangjun, chief designer of the payload of HXMT, says the space telescope will focus on the Galactic plane. If it finds any celestial body in a state of explosion, it will conduct high-precision pointed observation and joint multiband observation with other telescopes either in space or on the ground.

http://news.xinhuanet.com/english/2017-05/28/c_136321720.htm

http://www.financialexpress.com/lif...ay-space-telescope-to-study-milky-way/689643/
 
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ESA to assist China’s Chang’e-5 mission to the Moon and back
ANDREW JONES
2017/05/30
The Ariane 5 V188 launcher carrying Herschel and Planck rises above ESA’s 15 m-diameter tracking dish at Kourou, French Guiana, on 14 May 2009. (Photo: ESA/A. Chance)
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The European Space Agency (ESA) will be providing invaluable assistance to China when it launches the Chang’e-5 mission to land on and retrieve samples from the Moon later this year.

Chang’e-5 is set to launch from the Wenchang Satellite Launch Centre in November and marks the final stage of China’s initial lunar exploration project. It will also be the first lunar sample return in over 40 years.

The complex and challenging mission will involve orbiting and landing on the Moon, then collecting samples, performing a lunar orbit rendezvous and returning to the Earth.

Following an agreement between European Space Operations Centre (ESOC) and China, the ESA tracking network (ESTRACK) will use two ground stations to receive signals and send commands, thus providing a vital link between the Chinese spacecraft and the ground.

Paolo Ferri, Head of the Mission Operations Department at ESOC, explains that ESTRACK support is fundamental for the success of the mission as it supports time and mission critical activities.

Two 15m antennae will support two critical phases of the Chang’e-5 mission: the initial phase after launch, with the ground station at Kourou in French Guyana, and the final phase, in which the sample-return capsule returns to Earth, supported by the station of Maspalomas* in the Canary Islands.

During the Launch and Early Orbit phase (LEOP), acquisition and radio contact with the spacecraft is a vital part of mission operations, especially if the spacecraft experiences issues that require fast intervention or, even worse, if the launcher misperforms and the spacecraft is not found in its expected trajectory.

rollout-longmarch5-oct28-2016-sudong-cd-1_0.jpg

Above: Rollout of the first Long March 5 in October 2016 (China Daily/Su Dong).

Kourou is ideal for first acquisition of the spacecraft immediately after launch, as the separation from the launcher typically occurs in the equatorial plane, Ferri says, but stresses there can be no mistakes.

“The station has to be ready and work at the right time and everything has to work - there is no second chance”.

“For the reentry support the ESTRACK tracking will be essential for the precise localisation of the landing site of the capsule. Again, missing this pass will endanger or delay the recovery operations.”

“The geographical location of the stations, together with the high quality and experience of the ESA teams are the reasons for China to entrust this critical activity to us,” Ferri explains.

maspalomas_station.jpg

Above: Maspalomas station hosts a 15-metre antenna with reception in S- and X-Band (ESA).

For both the launch and landing there will also be a Chinese ground station in parallel, to add redundancy in case of problems.

The Chang’e-5 reentry capsule is expected to land in Siziwang Banner, Inner Mongolia – the same landing area used for China’s Shenzhou human spaceflight missions.

This final phase is likely to take place less than a month after launch of Chang’e-5, with the earlier sample collection and ascent phases expected to be completed within a single 14 Earth-day-long period of sunlight over the landing site in order to reduce the risks and complexities of dealing with the extreme cold of nighttime on the Moon.

During the rest of the Chang'e-5 mission China will use their own, growing tracking network, including the lunar landing phase which will take place around 400,000 kilometres away from the Earth.

The last lunar sample return mission, the Soviet Union’s Luna 24, saw the ascent stage returned directly to Earth, but China has decided that the Chang'e-5 mission will include a lunar orbit rendezvous similar to that used to facilitate the US Apollo lunar landings.

The 8.2 metric ton Chang'e-5 spacecraft requires the power of Long March 5 heavy-lift launch vehicles, and consists of a lander, a return vehicle, a service module and an ascent unit, the latter two of which will rendezvous in orbit after the lander has loaded the ascent unit with samples. The return vehicle will then receive the samples before separating from the service module close to Earth and performing a skip reentry into the Earth’s atmosphere.

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The Chang'e-5 return capsule (right) and lander and ascent vehicles (left, background) (Framegrab/CCTV).

This complexity hints that China will be looking to use aspects of the Chang’e-5 mission as experience for future grand missions, such as human lunar landings and a Mars sample return mission.

The Chang’e-5 probe was developed by the China Academy of Space Technology (CAST) and will be delivered to the launch site on Hainan in August. Meanwhile, ESA’s preparation work has already started.

“First our team has to identify the technical support requirements and document the interfaces between the spacecraft and the ground station”. As we have been supporting the entire Chinese lunar programme - Chang'e1, 2, 3 and 5T - in the past, most of these interfaces are already defined and tested. Nevertheless the configuration of the ground stations for this new mission has to be defined, implemented and finally validated as part of the preparation phase,” Ferri explains.


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“Chinese ground support staff will be co-located at ESOC for the critical phases, also to ensure rapid and efficient communications - especially in case of unforeseen contingencies.”

The Kourou and Maspalomas stations are currently also used in support of ESA's Cluster and XMM-Newton scientific missions.

Expanding cooperation
This collaboration in tracking is just part of a broad and deepening partnership between ESA and China, and Paolo Ferri’s perspective gives a good indication of the mutual benefits and the possibilities for the future.

“International cooperation is always an enabler for both Agencies, and this is also the case for our long cooperation with China in the area of tracking and operations. We started in the last decade with Double Star, and then continued with all Chang'e missions.

“On the ESA side the cooperation has allowed us to gain experience on Moon activities, including tracking of the critical landing phase for Chang'e3 and for the reentry of the Chang'e-5T1 capsule, which required also delivery of high precision tracking information for localisation of the lander and of the capsule on the surface. This is extremely useful experience in view of future ESA and international activities on the Moon.”

As well as China Lunar Exploration (CLEP), which will also include the first ever landing on the lunar far side (2018) and will likely be extended with missions to the Moon’s poles in the 2020s, ESA and China last year cooperated on the Shijian-10 retrievable satellite, and are working on a joint solar science mission, SMILE.

It was recently widely reported that China and ESA have recently held discussions on cooperation related to ESA’s Moon Village vision, though these are likely to be at the level of approved missions rather than far-off planning a human outpost, especially as China is moving forward with its space station plans.

At the same time however, the future of global cooperation beyond the International Space Station in low Earth orbit is currently being shaped, with the projects and their constituent partners yet to be determined.

On this, ESA’s Ferri has an inclusive vision future: “I am convinced that space exploration is now coming out of the pioneering phase and can only further progress in the frame of a global cooperation among all space faring nations.”


* Ownership of the Maspalomas 15m antenna was in April handed over from ESA to the INTA, a Spanish national organization. ESA still integrates the antenna in its operations network when required.


http://gbtimes.com/china/esa-assist-chinas-change-5-mission-moon-and-back
 
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