An update on China’s lunar rover Yutu.
This is an excellent summary of the mission and its status, including detailed maps outlining the rover’s path before it finally lost the ability to move.
The competition heats up: China’s new spaceport and the giant rocket it is being built for.
The combination of the planned rocket, called the Long March 5 — and its derivatives — matched with the Wenchang Launch Center, China’s new sprawling spaceport, underscores the country’s shifting space gears. It enables China’s space station ambitions, while also boosting the nation’s plans for interplanetary exploration, as well as accomplishing human treks to the moon.
China’s Yutu rover is still functioning but cannot move.
Last week Yutu and its companion spacecraft, the Chang’e 3 Moon lander, awoke from a period of dormancy after the frigid, two-week lunar night — the third awakening since landing on 14 December, Chinese scientists said this week at the Lunar and Planetary Science Conference in The Woodlands, Texas. The probes continue to gather data and send it back to Earth.
But Yutu may never move more than the 100–110 metres it has already travelled from its landing site — in the Mare Imbrium. Mission officials had hoped that Yutu would travel to the rim of a nearby crater and explore it, but a mechanical failure in Yutu’s drive system has stilled the rover since late January.
I wish they would get their story straight. This article suggests that the problem wasn’t in the circuit that controls the storage of equipment during the long lunar night, as reported previously, but in the system that actually moves the rover.
It also appears from the story above that scientists were disappointed by the amount of information released at the Texas conference.
China finally reveals Yutu’s problem: the failure of a control circuit prevents it from storing its solar panels during lunar night.
A functioning control circuit is required to lower the rovers mast and protect the delicate components and instruments mounted on the mast from directly suffering from the extremely harsh cold of the Moon’s recurring night time periods. “Normal dormancy needs Yutu to fold its mast and solar panels,” said Ye. The high gain communications antenna and the imaging cameras are [also] attached to the mast. They must be folded down into a warmed electronics box to shield them from the damaging effects of the Moon’s nightfall when temperatures plunge dramatically to below minus 180 Celsius, or minus 292 degrees Fahrenheit.
Is Yutu alive or dead? Only the Chinese know for sure.
It’s alive! Though Chinese engineers say that Yutu is still having problems, they have gotten a signal from it.
The reports continue to be vague. It appears that they are in communication with the rover, which is good, but cannot get it to do what they need or want it to do, which is bad.
Apparently the rover was not prepped properly for the long lunar night and did not survive its second night.
Awaiting contact from China’s rover as lunar day arrives.
The sun started coming up over the weekend, so if Yutu is to come back to life, it must do it soon.
More information on the problems with China’s lunar rover Yutu.
It appears that the rover was not responding properly to commands from the ground and thus did not prep itself properly for going into hibernation for the long lunar night.
Something is wrong with China’s lunar rover.
The link above is exceedingly short, one sentence, and describes the problem as an “abnormity” which makes no sense, so there is as yet no clear idea what the issue is.
A longer report is here, but it doesn’t add much, other than the “abnormality” is related to “mechanical control.”
A look at China’s plans to develop a heavy-lift rocket.
China’s rover and lander on the Moon have both been successfully reawakened after hibernating through the two week long lunar night.
The Chinese rover Yutu, before going into hibernation for the long lunar night, successfully took its first spectrum of the Moon’s surface.
China’s rover is about to go to sleep for the long lunar night.
According to Wu Fenglei of the Beijing Aerospace Control Center, the lander will “go to sleep” at about 7 a.m. on Christmas Day and the moon rover, Jade Rabbit, will fall asleep at about 1 a.m. on Boxing Day. The forthcoming lunar night, expected to begin on Dec. 26, will last for about two weeks, experts with the center estimated. During their “sleep”, both lander and rover will have to tolerate minus 180 degrees Celsius. Scientists tested the lander early Tuesday to ensure it can stand the temperature drop. Both lander and rover are stable, said Wu, adding they have completed a series of scientific tasks in the past two days.
This report states the rover landed in Sinus Iridum, the original announced landing site, contradicting other reports that said the lander came down in Mare Imbrium.
China outlines its plans for its next two unmanned lunar probes, with the second targeted as a 2017 sample return mission.
Key quote:
The new mission planned for 2017 would mark the third and final phase of China’s robotic lunar exploration program and pave the way for possibly landing an astronaut on the moon after 2020.
As I mentioned last night, the soft landing on Saturday demonstrated they are developing the technology to land a manned vehicle safely on the Moon. To return samples safely would demonstrate they are developing the technology to return that manned vehicle safely as well.
Update: Yutu did not land anywhere near its planned landing location.
China had originally publicized a location in the Sinus Iridum (Bay of Rainbows) — a level area thoroughly surveyed by a previous Chinese mission — as the landing spot. Local media even stated that Chang’e 3 landed there. But Chinese scientists have since confirmed that the spacecraft landed slightly to the east, in the northern part of Mare Imbrium (Sea of Rains).
It is unclear whether this was a late change or the result of a technical problem.
The competition heats up: After a successful soft landing, China’s lunar rover Yutu has successfully rolled onto the lunar surface.
The real significance of this mission is that China has now demonstrated that it has developed the engineering to achieve a controlled soft landing on another world. With this technology, they can move on to building a manned lander, something only the U.S. has been able to accomplish.
Chinese scientists have concluded that the asteroid Toutatis is a rubble pile barely held together by gravity, based on data obtained from Chang’e 2’s flyby one year ago.
China’s Chang’e 3 lunar orbiter has lowered its orbit around the Moon.
This is in preparation for the planned landing of its rover on December 14.
The failure of a Chinese Long March rocket to put a commercial satellite into orbit earlier this week was caused by a malfunction in the rocket’s third stage.
A Brazilian earth research satellite was lost today when a Chinese Long March rocket failed to put it into orbit.
The cause of the failure is not yet known. This failure, however, is a strong boost for SpaceX, as China is its strongest competitor in terms of price.
China’s lunar probe has entered lunar orbit.
The rover Yutu is scheduled to descend to the surface on December 14.
China has successfully launched its first rover mission to the Moon.
Touchdown on the Moon is scheduled for December 14. If they succeed, it will be the first softlanding on the Moon since 1976.
Chang’e 3 and Yutu – The tale of a beautiful goddess and her rabbit on the Moon.
In this case, the goddess and rabbit are Chinese robots exploring the Moon for science. The launch is scheduled for 1:30 am Monday in China, which is 12:30 pm Eastern Sunday in the U.S.
China’s next lunar mission, set to launch next month, will have a rover named “Yutu”.
In Chinese folklore, Yutu is the white pet rabbit of Chang’e, the moon goddess who has lent her name to the Chinese lunar mission. Legend has it that, after swallowing a magic pill, Chang’e took her pet and flew toward the moon, where she became a goddess, and has lived there with the white jade rabbit ever since.
Chang’e 2 is the name of the entire mission.
A new Chinese suspension bridge, set to open November 25, has won top honors for being such a long three-tower/two span bridge.
When it opens on Nov. 25, Taizhou Bridge will carry six lanes of traffic (plus two maintenance lanes) nearly 3-km across the Yangtze River. Though the total length of 2,940 m is an awfully long way, the bridge has two main spans using three towers rather than the norm of one main span using two support towers.
The two spans are each 1,080 m (3,540 ft) long, which individually is less than the main span of the Golden Gate Bridge at 1,280 m (4,200 ft), and much less than the 1,990-m (12,830 ft) span of the Akashi Kaikyō Bridge, the longest main span of any suspension bridge on Earth. Two end spans of 390 m (1,280 ft) connect Taizhou Bridge with the banks of the river.
But in using two spans the Taizhou Bridge is a major breakthrough in structural engineering. The design requires the perfect balance of flexibility and rigidity in its 192-m (630-ft) steel central tower in order to withstand changing and imbalanced loads to either side. The complementary side towers are 178 m (584 ft) tall, and are made of concrete. The two main cables supporting the bridge are 3,110 m (10,200 ft) long and 72 cm (28 in) in diameter.
Think about it. The central tower is going to be pulled from both directions. Similarly, the outside towers must have incredible strain pulling them towards the center. Balancing it all is an amazing architectural achievement.
China reveals its space station plans.
“China Space Station (CSS) will operate in orbit from 2022 to 2032. This period will provide much more opportunities to scientists in China and all of the world after the international space station,” Gu Yidong, president of the China Society of Space Research, said at the American Society for Gravitational and Space Research conference here Nov. 3 – 8. The station’s core module is slated to launch in 2018, followed by two laboratory modules in 2020 and 2022. The outpost will be located in an orbit ranging from 350 kilometers to 450 kilometers above Earth and inclined 42 degrees relative to the planet’s equator.
The article describes in detail their research plans on their station, which sound much the same as the kind of research done on ISS. I suspect this is a bit of misdirection. Their station is clearly designed as a prototype interplanetary station, much like Mir. I believe that any research they do on it will be focused around that fact, which will make that research significantly different that the work done on ISS, which is often not very effective and poorly focused.
The competition heats up: A key new detail about SpaceX’s new Raptor rocket engine is revealed.
The only detail about the engine in the release noted it will be capable of generating nearly 300 tons of thrust in vacuum, around four times more powerful than the Merlin 1D. However, it is possible a Raptor engine set could become the baseline for a huge future rocket to be used by SpaceX for missions to Mars, along with a potential role with a Mars ascent stage. [emphasis mine]
It appears that the engine might be intended to replace the Merlin engine entirely, thus giving the Falcon 9 (and other future SpaceX rockets) significantly more power, both for putting payload into orbit as well as returning to the ground.
Meanwhile, it also appears the Chinese, who are SpaceX’s biggest competitor in terms of price, are developing their own methane-oxygen engine with likely similar capabilities.
Ain’t competition wonderful?
China complains about the ban of its scientists at a NASA Kepler conference.
The meeting is a key event for scientists searching for planets beyond the solar system. NASA has rejected applications from Chinese nationals, citing a new security law. In Beijing, foreign ministry spokeswoman Hua Chunying called the move “discriminatory”. The conference is for US and international teams who work on Nasa’s Kepler space telescope program. It will be held at Nasa’s Ames research centre in California next month.
And I say, tough. China does not distinguish between civilian and military research, and in fact has often used its scientists to do espionage, stealing both military and industry secrets in the process.
Posted in Virginia as we pass through Harrisonburg. Note again that Diane, not I, is doing the driving.
The competition heats up: China today unveiled its first unmanned lunar rover, set for a December launch, and announced a competition for the public to name it.
The competition heats up: China today successfully launched a brand new quick response rocket.
Very little is known about the Kuaizhou rocket, other than it was developed by CASIC. No photos or graphics exist in the public domain. It is also known the rocket – likely on its test flight – was carrying a satellite, called Kuaizhou-1. Built by the Harbin Institute of Technology, the new satellite will be used for emergency data monitoring and imaging, under the control of the national remote sensing center at the national Academy of Sciences. The new satellite is probably part of a “quick response satellite system” model that was already announced as in the works by the Chinese.
The rocket appears to be fueled entirely by solid rocket motors. Thus, they could build a bunch and have them in storage, ready to go at any time.
