Chinese unmanned lunar orbiter returns home

Experimental orbiter prepares for home trip - CCTV News - CCTV.com English 

China's unmanned lunar orbiter returns home - CCTV News - CCTV.com English

China succeeded Saturday in the world's first mission to the Moon and back in some 40 years, becoming the third nation to do so after the former Soviet Union and the United States.

The test lunar orbiter, nicknamed "Xiaofei" on Chinese social networks, landed in Siziwang Banner of China's Inner Mongolia Autonomous Region early Saturday morning.

Search teams have already recovered the orbiter at the designated landing area, about 500 kilometers away from Beijing.

Launched Friday last week, the orbiter traversed 840,000 kilometers on its eight-day mission that saw it round the far side of the Moon and take some incredible pictures of Earth and Moon together.

The re-entry process began at around 6:13 a.m. Saturday morning, with the orbiter approaching Earth at a velocity of about 11.2 kilometers per second.

The high speed led to hefty friction between the orbiter and air and high temperatures on the craft's exterior, generating an ion sheath that cut off contact between ground command and the orbiter.

To help it slow down, the craft is designed to "bounce" off the edge of the atmosphere, before re-entering again. The process has been compared to a stone skipping across water, and can shorten the "braking distance" for the orbiter, according to Zhou Jianliang, chief engineer with the Beijing Aerospace Command and Control Center.

"Really, this is like braking a car," said Zhou, "The faster you drive, the longer the distance you need to bring the car to a complete stop."

The "bounce" was one of the biggest challenges of the mission, because the craft must enter the atmosphere at a very precise angle. An error of 0.2 degrees would have rendered the mission a failure.

Wu Yanhua, vice director of China's State Administration of Science, Technology and Industry for National Defense, said the successful test mission has gathered a lot of experimental data and laid a solid foundation for future missions.`  

Paving way for new probe

The eight-day program is a test run for the final chapter of China's three-step--orbiting, landing and finally returning--lunar program.

"Xiaofei" is obtaining data and validating re-entry technology such as the heat shield and trajectory design for a future landing on the moon by Chang'e-5.

Earlier reports said Chang'e-5 will be launched around 2017. The goal is to collect samples from the Moon and return to Earth. If successful, China will become the third nation to do so.

Calling "Xiaofei" a pathfinder for Chang'e-5, Zhou Jianliang said the data acquired by the lunar orbiter will optimize technology for Chang'e-5.

Hao Xifan, deputy chief of China's third phase lunar exploration program, also said the mission validated ground support capacities, craft landing technology and recoverable spacecraft technology.

According to Wu Weiren, chief designer of China's lunar exploration program, Chang'e-5 is expected to collect a 2-kg sample from two meters under the Moon's surface and bring it home.

Aside from the high-speed re-entry, major technological challenges for the craft center on surface sampling, taking off from the Moon, and lunar orbit rendezvous, Wu said.

READY TO MAKE HISTORY, AGAIN

China launched a pair of orbiting lunar probes and last year landed a craft on the moon with a rover on board.

Saturday's success is another step forward for China's ambition that could eventually land a Chinese citizen there. Few countries can rival China's space program although China never intended to participate in any "space race".

In an earlier interview with Xinhua, Wu Weiren said lunar probe technology and software could be of great economic value if adapted for commercial use.

Commercial gains aside, the space program is already a marker of China's global stature and technical expertise. The Chang'e lunar probes - named after a goddess who took her pet Yutu, or jade rabbit, to the moon - are a symbol of great national pride.

The country sent its first astronaut into space in 2003, becoming the third nation after Russia and the U.S. to achieve manned space travel independently. In 2008, astronauts aboard the Shenzhou-7 made China's first space walk. There are plans for a permanent space station, expected to be set up around 2022.

The Chang'e-1 and Chang'e-2 missions in 2007 and 2010 respectively, capped the orbital phase of the three step project. Chang'e-1 crashed onto the Moon's surface at the end of its mission, and Chang'e-2 was sent into deep space to become China's first man-made asteroid.

The ongoing second phase saw Chang'e-3 soft land on the moon carrying moon rover Yutu in December 2013. Chang'e-4 was a backup for Chang'e-3 and has not been deployed.

In the meantime, Yutu has entered its 11th dormancy earlier October, although its functions have degraded considerably after it encountered control issues in January this year. Experts had feared that it might never function again, but Yutu has stubbornly managed to wake up from its sleep mode ever since.

None of those missions were intended to return to Earth and this has pushed the 2017 mission further into spotlight.

"The Chang'e-5 mission will be yet another historic moment for China's lunar program," Wu said.

(Xinhua)

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Standard faces for each countries

Learn and look to China for space technology

The Jade Rabbit moon rover is seen in a picture taken by a camera on board the Chang'e-3 probe lander on December 15, 2013 (CCTV/AFP, CCTV)

IT was a fitting tribute to China for successfully landing a lunar rover on the moon on Dec 14.
The Chinese people must be proud of their achievement for it was the Chinese who invented the gun powder which was a precursor to the rocket.

Not only China, but all developing countries or the Third World shared the joy and achievement which was thought impossible to be achieved by a developing country.

Being a superpower, it is only right that China should take its place beside the United States and Russia in space exploration.

The country has come a long way since the infamous Cultural Revolution to show its might in science and technology.

It has paved the way for other developing countries to emulate China’s feat, which may not ­necessarily be in space exploration.

The successful lunar rover touched down “... on an ancient 400km wide plain ...” has restored the great civilisation that it had, long before other countries had invented rudimentary science and technology.

By landing its lunar probe on the moon, China had put smiles on all her past emperors and leaders who had painstakenly built the great nation which is now the envy of many.

Perhaps Malaysia will now look at China too besides the US and Russia in acquiring space technology by sending more students and scientists there.

Since the bamboo curtain has been dismantled, there is much that China can offer Malaysia in space science.


By HASSAN TALIB Gombak, Selangor, Malaysia

China 'ready' to launch Mars mission

Photo: Xinhua

China is likely to expand its horizon in space travel by possible Mars exploration, expert said.

After the unmanned Chang'e-3 successfully completed its soft-landing on the moon, people from both home and abroad have been wondering whether China will send probes to Mars, which has become a key goal for many foreign space organizations.

According to the chief designer of China's lunar probe program, Wu Weiren, China is ready.

"We have the potential to go there in the wake of the successes of the Chang'e-1 and Chang'e-2 missions," Wu said at a news conference held in Beijing on Tuesday, adding that the final decision is up to the government, Xinhua News Agency reported.

"We follow our own approach that respects stable progress and dislikes rash and reckless moves," he said. "We don't want to compete with any country in this regard."

Wu added that the Long March-5 rocket series with the maximum thrust of 1,100 tons can ensure the sending of a Martian probe.

"In terms of the carrying capacity of the rocket and the tracking and control system, China is capable of sending Martian probes," Pang Zhihao, a research fellow with the Chinese Academy of Space Technology, told the Global Times on Wednesday.

Pang said that the two deep space monitoring stations in China have shown their ability tracking Chang'e 2, which is about 64 million kilometers from Earth.

"But China still needs to build deep space monitoring stations abroad to make up for blind measurements to track deep space detectors round the clock," Pang said.

Furthermore, as scientists around the world have been exploring the possibility of living on the moon, the research on bioregenerative life support systems, which hold much promise for planetary bases, has been conducted in China.

The Beijing University of Aeronautics and Astronautics has recently been praised for its work on closed ecological systems suitable for growing plants in outer space, according to the university's website.

Wu also noted that compared with the US spending 2 to 2.5 percent of GDP on its lunar exploration program at that time, China's input - only a few ten-thousands of the country's GDP - is not very much.

Besides, only about 40 percent of the 118 lunar probe attempts by the US and the Soviet Union during the space race in the 1960s and 1970s had been successful, while China's Chang'e-1 to Chang'e-3 missions have all succeeded, he said.

Although China has not officially announced any intention to fly a human mission to the moon, the door is now open and - if they have the will - nothing will stand in their way, said James Longuskian, associate fellow of the American Institute of Aeronautics and Astronautics .

Contributed By Fang Yang Global Times

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