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WASHINGTON, Nov. 10 (Xinhua) -- Using its near-infrared vision to peer nine billion years back in time, NASA's Hubble Space Telescope has uncovered an extraordinary population of young dwarf galaxies brimming with star formation, the U.S. space agency announced on Thursday.While dwarf galaxies represent the most common type of galaxy in the universe, the rapid star-birth observed in these newly- found examples may force astronomers to reassess their understanding of the ways in which galaxies form.The galaxies are a hundred times less massive, on average, than the Milky Way, yet they churn out stars at such a furious pace that their stellar content would double in just 10 million years. By comparison, the Milky Way would take a thousand times longer to double its star population.The universe is estimated to be 13.7 billion years old, and these newly-discovered galaxies are extreme even for the young universe -- when most galaxies were forming stars at higher rates than they are today. Astronomers using Hubble's instruments could spot the galaxies because the radiation from young, hot stars has caused the oxygen in the gas surrounding them to light up like a bright neon sign."The galaxies have been there all along, but up until recently astronomers have been able only to survey tiny patches of sky at the sensitivities necessary to detect them," said Arjen van der Wel of the Max Planck Institute for Astronomy in Germany, lead author of a paper on the results to be published online on Nov. 14 in The Astrophysical Journal. "We weren't looking specifically for these galaxies, but they stood out because of their unusual colors. "The observations were part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), an ambitious three- year study to analyze the most distant galaxies in the universe. CANDELS is the first census of dwarf galaxies at such an early epoch."In addition to the images, Hubble has captured spectra that show us the oxygen in a handful of galaxies and confirmed their extreme star-forming nature," said co-author Amber Straughn at NASA's Goddard Space Flight Center. "Spectra are like fingerprints. They tell us the galaxies' chemical composition."The CANDELS team uncovered the 69 young dwarf galaxies in near- infrared images taken with Hubble's Wide Field Camera 3 and Advanced Camera for Surveys.The observations suggest that the newly-discovered galaxies were very common nine billion years ago. However, it is a mystery why the newly-found dwarf galaxies were making batches of stars at such a high rate.

BEIJING, Jan. 26 (Xinhua) -- China will firmly stand together with African countries while unswervingly pushing forward Sino-African strategic partnership, no matter how the international environment changes, said Chinese Vice Foreign Minister Zhai Jun Thursday.Zhai made the remarks in a signed article on top Chinese political advisor Jia Qinglin's upcoming visit to Africa.Africa still faced enormous challenges against the backdrop of simmering global finance crisis, and turbulence encountered by several countries in western Asia and northern Africa, which dealt a blow to Africa's peace, stability and development, Zhai said, adding that some outside forces' intervention into Africa's internal affairs impeded the integration process among African countries.Within this context, there is stronger demand of African countries for stability, development, solidarity and independence, he said.The international community should pay more attention to Africa's voice and problems, respect its opinions, accommodate its concerns, protect peace, stability and development in Africa, and support Africa's independent settlement of issues in its own region, Zhai said.He said Jia's visit, first foreign trip paid by Chinese leaders in the Chinese Lunar New Year, will be of great significance in deepening Sino-African ties and cementing the solidarity and cooperation among developing countries, Zhai said.Jia will declare China's determination on developing Sino-African ties during the trip, he said.Enhancing solidarity and cooperation with Africa constitutes an important part of China's diplomacy, and will be the long-term strategic choice firmly pursued by China, Zhai said.

CANBERRA, Dec. 9 (Xinhua) -- Scientists from Australia's University of New England on Friday said they had discovered the remarkably fossil isa metre-long arthropod with excellent vision called anomalocaris from Emu Bay Shale of South Australia.The scientists reported their finding on the anomalocaris in thescience journal Nature this week.It is reported that anomalocaris is a fearsome ancient predator that swam in the Cambrian oceans 500 million years ago. The researchers said the presence of anomalocaris would have driven the development of protective adaptations in prey animals. Such an escalatory 'arms race' would have seen, for instance, the evolution of such adaptations in prey as shells, camouflage and burrowing into sediments. "It has been unbelievably frustrating being able to see eyes like these at fossil sites like the Burgess Shale (in the Canadian Rocky Mountains), but not have any details. It is really refreshing to have our ideas about these animals confirmed at last, " comments Simon Conway Morris, a palaeontologist at the University of Cambridge, the United Kingdom.The research team was led by paleontologist Dr John Paterson, of the University of New England. He said the most surprising discovery of anomalocaris is the huge number of tiny hardened lenses in each eyes."When you consider that a modern housefly, for example, has about 3000 lenses, it's pretty impressive that an animal half a billion years old already has remarkable vision like this," Paterson said in statement."The fact that each eye in anomalocaris would have had over 16, 000 lenses means it would have very, very good resolution."Paterson said the acute vision of Anomalocaris gave it a distinct advantage over competing predators and prey, as many Cambrian animals either had poor vision or were completely blind. Its acute vision rivals or exceeds that of most living insects and was probably comparable to predatory dragonflies today.He said their findings support the idea that compound eyes evolved very early on in arthropod evolution, before the evolution of jointed legs or hardened exoskeletons.The research team hopes they can find the more fossil remains of Cambrian creatures in the Emu Bay Shale.

MANILA, Dec. 18 (Xinhua) -- No Chinese national has so far been found dead in the flashfloods triggered by tropical storm Washi ( local name Sendong), a Chinese embassy official said on Sunday.When asked on possible casualties of Chinese nationals, an offical with the Cebu Consulate said they just contacted with relevant persons in disaster affected areas, and there is no report on the casualties of Chinese citizens. The Consulate still tried its best to get further information from other sources.The Philippine Red Cross said Sunday that the death toll from the tropical storm Washi in the Philippines rose to 497, with 162 others still missing.

BEIJING, Dec. 31 (Xinhua) -- In a New Year's address broadcast on Saturday, Chinese President Hu Jintao vowed that China will continue to develop friendly exchanges with other countries and positively participate in international cooperation on global issues.While addressing domestic and overseas audiences via state TV and radio broadcasters, Hu urged the acceleration of the transformation of the country's economic development pattern and structural adjustments while making more efforts in ensuring people's livelihood.The country will continue to balance maintaining steady and relatively fast economic growth with adjusting its economic structures and managing inflation expectations, he said in the speech titled "Jointly Improve World Peace and Development," which was broadcast by China Radio International, China National Radio and China Central Television.A photo released on Dec. 31, 2011 shows Chinese President Hu Jintao delivering a New Year address, titled "Jointly Improve World Peace and Development", to domestic and overseas audiences via state TV and radio broadcasters.China will stick to the guidelines of "one country, two systems," "Hong Kong people governing Hong Kong," "Macao people governing Macao," and a high degree of autonomy in maintaining the long-term prosperity and stability of Hong Kong and Macao, Hu said."We will adhere to the principles of 'peaceful reunification' and 'one country, two systems,' continue to push forward the peaceful development of cross-Strait relations, ensure the basic benefits for those of the Chinese nationality, and endlessly work for the common benefit of the compatriots on both sides of the Taiwan Strait," he said.2011 was the first year of the country's 12th Five-Year Plan period (2011-2015). In the face of complicated international situations and arduous tasks in maintaining domestic reform, development and stability, Chinese people united and continued to push forward the opening up and reform drive and the socialist modernization construction, while maintaining steady and relatively fast economic growth and making progress in building a well-off society in an all-around way, he said.China was also actively engaged in international cooperation to boost the growth of the global economy and financial stability, and it was involved in resolving international and regional issues, he said.The world is currently witnessing multipolarization and globalization, and various countries are increasingly interdependent, Hu said."However, the instability and uncertainty of the world economic recovery is on the rise, international and regional hot-topic issues have cropped up one after another, and the peace and development of the world faces unprecedented opportunities and challenges," Hu said.China will stick to peace, development and cooperation, adhere to independent foreign policy, maintain world peace and promote common development, Hu said.The country will stick to the principle of mutual benefit when opening itself up, he said."We will develop friendly cooperations with all countries on the basis of the five principles of peaceful co-existence, and we will continue to actively participate in international cooperation on global issues," Hu said."I believe that as long as people from all countries make efforts hand-in-hand, the world will have a better future and the welfare of the people of all countries will improve," Hu said.An article by Hu on boosting the country's cultural development will be published in Qiu Shi (Seeking Truth), an official magazine of the Communist Party of China Central Committee, on Jan. 1.

来源：资阳报