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WASHINGTON, July 20 (Xinhua) -- Using the Hubble Space Telescope, astronomers have discovered a fourth moon orbiting the icy dwarf planet Pluto, the U.S. National Aeronautics and Space Administration (NASA) announced Wednesday in a statement. The tiny, new satellite, temporarily designated P4, was uncovered in a Hubble survey searching for rings around the dwarf planet.P4 was first seen in a photo taken with Hubble's Wide Field Camera 3 on June 28. It was confirmed in subsequent Hubble pictures taken on July 3 and July 18. It is the smallest moon discovered around Pluto. It has an estimated diameter of 8 to 21 miles (13 to 34 km). By comparison, Charon, Pluto's largest moon, is 648 miles (1,043 km) across, and the other moons, Nix and Hydra, are in the range of 20 to 70 miles in diameter (32 to 113 km).Two labeled images of the Pluto system taken by the Hubble Space Telescope's Wide Field Camera 3 ultraviolet visible instrument with newly discovered fourth moon P4 circled. The image on the left was taken on June 28, 2011. The image of the right was taken on July 3, 2011."I find it remarkable that Hubble's cameras enabled us to see such a tiny object so clearly from a distance of more than 3 billion miles (5 billion km)," said Mark Showalter of the SETI Institute in California, who led this observing program with Hubble.P4 is located between the orbits of Nix and Hydra, which Hubble discovered in 2005. Charon was discovered in 1978 at the U.S. Naval Observatory and first resolved using Hubble in 1990 as a separate body from Pluto.The dwarf planet's entire moon system is believed to have formed by a collision between Pluto and another planet-sized body early in the history of the solar system. The smashup flung material that coalesced into the family of satellites observed around Pluto.The finding is a result of ongoing work to support NASA's New Horizons mission, scheduled to fly through the Pluto system in 2015. The mission is designed to provide new insights about worlds at the edge of our solar system. Hubble's mapping of Pluto's surface and discovery of its satellites have been invaluable to planning for New Horizons' close encounter."This is a fantastic discovery," said New Horizons' principal investigator Alan Stern of the Southwest Research Institute in Colorado. "Now that we know there's another moon in the Pluto system, we can plan close-up observations of it during our flyby."

MOSCOW, Aug. 24 (Xinhua) -- A Russian Progress cargo ship crashed into Siberia after failing to reach the right orbit Wednesday. The crash marked the second failure in space launch in less than a week and the third in this year, prompting local media to suspect a major reshuffle in Russia's space industry.UNPRECEDENTED FAILUREThe Progress M-12M unmanned freighter was launched to the International Space Station from Baikonur space center in Kazakhstan on Wednesday. It was expected to reach a near-Earth orbit in about nine minutes after launch.However, after the 325th second of the flight, which was just a few seconds before the vessel should reach the orbit, the ground control center lost it.Russian space agency Roscosmos confirmed later that the cargo ship failed to reach the orbit and fell down. Russian Progress M-12M cargo ship is launched to the International Space Station from Baikonur space center in Kazakhstan on Wednesday, Aug. 24, 2011. It has failed to reach the orbit, the Interfax news agency reported.The malfunction of the Soyuz-U rocket's engine was generally believed to be the cause of the accident, according to local media.A source in the space industry said the spaceship had sent a breakdown report while separating from the Soyuz rocket.Some unconfirmed reports said the fuel tank of the booster leaked and the engine was automatically turned off to avoid explosion.The wreckage of the Progress cargo ship has already fallen in southern Siberia's Altai Republic, where a big explosion was heard by locals, reported RIA Novosti news agency.A state investigation committee has been formed to look into the first ever loss of a Progress freighter.CONCERNS OVER FUTUREThe unprecedented accident raised concerns over the reserves of the six crew members on board the ISS.The ship was loaded with over 3.5 tons of supplies for the ISS, including scientific materials, oxygen, water and food.According to Russia's Ground Control, the loss of these supplies will not affect the ISS crew as there are enough stocks of necessities for two to three months.Also, there is no need for premature return of the crew, said Vladimir Solovyov, a space official.However, it still casts some shadow over the ISS program that relies on Russia exclusively following the retirement of U.S. shuttles.A source from the Russian space industry said the scheduled launches of the Soyuz rockets are likely to be suspended until the reasons of the accident are established.This means that current crew members of the ISS would likely stay longer in the space than planned, as the new members might not be able to replace them on schedule, the source explained. Solovyov said the launch of the next Progress is scheduled for October 28.So far, Roscosmos has refrained from comments regarding the possible halt in manned missions aboard Soyuz carrier rockets."Comments will follow. Now it is necessary to determine the causes of today's abortive launch of a Soyuz-u carrier rocket with the Progress M-2M transport ship," Roscosmos told Itar-Tass news agency.Local media raised the prospect of a major reshuffle in Russia' s space industry as the country has lost a total of six space vehicles over the past nine months.On Aug. 18, a carrier rocket Proton-M failed to deliver to the orbit communication satellite Express-AM4. Earlier in February, Russia had lost a satellite named Geo-IK2.In December 2010, a booster malfunction resulted in the loss of three satellites in the global positioning and navigation system GLONASS.

HAVANA, Sept. 6 (Xinhua) -- Cuban medical authorities have launched the sales of the world's first therapeutic vaccine against lung cancer, local officials said on Tuesday.The CimaVax-EGF vaccine, as a result of a 25-year research into diseases related to tobacco smoking, has been developed by researchers and scientists at the Center of Molecular Immunology (CIM) in Havana.The active drug ingredient in the vaccine is based on "a protein we all have when cancer is uncontrolled." "The epidermal growth factor is related to all cell proliferation," said Gisela Gonzalez, head researcher of the project."The drug could turn the cancer into a manageable, chronic disease by generating antibodies against the proteins which triggered the uncontrolled cell proliferation," she said.The immunogenic vaccine is appropriate to patients with advanced lung cancer in stages of three and four, showing no positive response to other kinds of treatments such as chemotherapy and radiotherapy, the expert said."It is not possible to prevent the disease but this vaccine improves significantly the status of the critically ill patients," she added.She said the CimaVax-EGF has gone through clinical studies and trials in over 1,000 patients across the island and is currently distributed free of charge in all hospitals of the Caribbean island nation.Gonzalez also said researchers at the CIM planned to use the same principle of the CimaVax-EGF in treating other cancerous tumors such as prostate, uterus and breast cancers.Lung cancer is regarded as one of the world's most serious, common and deadly cancers and is most frequently found among tobacco smokers.According to the World Health Organization, the disease generally kills 5 million people a year, and the figure is expected to rise to as much as 8 million by 2030 unless smoking habits are changed.In Cuba, like many other developing countries across the world, smoking is seen as a status symbol. Lung cancer, killing about 20,000 people a year in the Caribbean country, is considered a serious threat to public health and the leading cause of death in 12 of the country's 15 provinces.

BEIJING, July 19 (Xinhuanet) -- Amazon on Monday launched its Kindle textbook rental service, which allows students to rent "tens of thousands of textbooks", according to Los Angeles Times.The e-book textbook rental service will help students save as much as 80 percent on some titles.Amazon said that students can now rent textbooks from 30 to 360 days and can either rent them again or purchase them once the rental period is up."Students tell us that they enjoy the low prices we offer on new and used print textbooks. Now we're excited to offer students an option to rent Kindle textbooks and only pay for the time they need—with savings up to 80 percent off the print list price on a 30-day rental," Dave Limp, vice president of Amazon Kindle said, according to PC Magazine.Rentals can be read on Amazon's Kindle eReaders, and Kindle apps for PCs, as well as smartphones and tablet computers running Apple's iOS, Microsoft Windows Phone 7 and Google's Android operating system.Rentals also have a clear advantage over physical copies that students' notes and highlighted content will be stored in the Amazon Cloud, and can be accessed if students rent the books again or buy at a later time.

VIENNA, Sept. 9 (Xinhua) -- The three-day Traditional Chinese Medicine (TCM) exhibition opened Friday in the Flower Garden Hirschstetten in Vienna, with the aim to introduce traditional Chinese medicine to the Austrians and to arouse their interest in the culture of Chinese medicine.Holding for the second time, the exhibition this year have attracted more visitors to take part in the health talks on traditional Chinese medicine, read or buy books around the theme of traditional Chinese medicine. Some visitors enthusiastically tried Chinese diet therapy prepared by the organizers.In recent years, traditional Chinese medicine has been increasingly recognized and accepted in Austria. It has already not only entered into the classroom but also into the hospital and clinic.Some private health insurance companies in Austria have started to include the treatment by traditional Chinese medicine into their insuring categories. Chinese patent drugs are already available in many pharmacies in Austria.But in general, traditional Chinese medicine still faces many limits in Austria, which hasn't been involved into the public health insurance system. Some Austrians still have doubts of Chinese medicine, in particular the medicinal herb drugs. All these have restricted the development of traditional Chinese medicine here.Currently, major clinics of traditional Chinese medicine carry out only acupuncture and moxibustion, massage and other health-care physical therapy.Richard Schmerker, a doctor of traditional Chinese medicine in Austria, told reporters that the development of traditional Chinese medicine here still faces many challenges and the biggest one is the shortage of effective propaganda and popularization.But he expressed his full confidence about the future of traditional Chinese medicine in Austria. He said, the uniqueness of finding the root cause of diseases and laying the axe to the root will make it be accepted by more and more Austrians.

来源：资阳报