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BEIJING, Oct. 26 (Xinhuanet) -- The question, why the first documented supernova was super-sized and grew so fast, has puzzled astronomers for centuries. Now it is solved by US researchers.The supernova, an exploded star, was observed in 185 A.D. and documented as a mysterious "guest star" by Chinese astronomers. It was visible for eight months.Scientists later found the supernova, 8,000 light years away, was a bigger-than-expected supernova remnant. BBC reported that if the infrared light it emits could be seen by human eyes, it would appear to be as large as the full Moon in the sky.Through observations in space telescopes, researchers of a latest study revealed that the explosion took place in a cavity in space, which allowed the star's remains to travel out much faster and farther. The study was published online in the Astrophysical Journal Monday.The supernova was "two to three times bigger than we would expect for a supernova that was witnessed exploding nearly 2,000 years ago. Now, we've been able to finally pinpoint the cause," stated Brian Williams, lead author of the study and an astronomer at North Carolina State University in Raleigh.

SAN FRANCISCO, Nov. 21 (Xinhua) -- E-commerce and online payment giant eBay announced on Monday that it has acquired New York-based technology startup Hunch, an online platform that delivers customized recommendations to users based on their individual tastes.Hunch's team and expertise in areas like machine learning, data mining and predictive modeling are expected to help eBay to integrate more advanced recommendations into its website, said the San Jose, California-based company."Unlike traditional online retail approaches, Hunch will enable eBay to move beyond standard item-to-item recommendations and use a broader variety of members' online tastes and interests to suggest new and interesting items for them to browse and buy on eBay," said the company in a press release.Terms of the deal were not disclosed. Technology news site TechCrunch founder Michael Arrington said in his personal blog prior to the acquisition announcement that eBay would acquire Hunch for 80 million U.S. dollars.Hunch, co-founded by popular photo-sharing service Flickr co- founder Caterina Fake with an 11-person team of MIT graduates, was open to the public in 2009. According to eBay, Hunch's employees will remain with the company in New York.

BEIJING, Jan. 21 (Xinhua) -- Chinese leaders on Saturday offered festive greetings to people across the nation as well as overseas Chinese around the world at a gathering to mark the Lunar New Year that falls on Jan. 23.President Hu Jintao, top legislator Wu Bangguo, Premier Wen Jiabao and top political advisor Jia Qinglin attended the gathering, organized by the Central Committee of the Communist Party of China (CPC) and the State Council at the Great Hall of the People in Beijing.Hosting the gathering, Hu, also General Secretary of the CPC Central Committee, extended regards to Chinese people at home and abroad and foreign friends on behalf of the CPC Central Committee and the State Council, the Cabinet.Premier Wen delivered a speech at the gathering, saying that the country has made a good start to the Twelfth Five-Year Plan (2011-2015) at a time of an austere and complicated international economic situation.Wen said the government would maintain stable prices and steady, rapid economic development, accelerate the transformation of development patterns and adjust the economic structure in a bid to enhance sustainable development, as well as place more importance on people's livelihoods, letting the people share the achievements of reform."We are going to face bigger challenges in the new year," Wen said. "We have the will, determination, courage and ability to overcome any difficulties. We have confidence in the motherland's successful and bright future."Wen said the country will resolutely take the socialist road with Chinese characteristics, and promote economic growth and social progress, as well as improving people's livelihoods, and democracy, rule of law, equality and justice."We need to keep a clear head and thoroughly apply the scientific outlook on development, so to advance the reform and openning up policy and the socialist modernization construction.Wen called for excellent achievements in a bid to put the country on a firm footing for the upcoming 18th National Congress of the Communist Party of China.Other leaders, including Li Changchun, Xi Jinping, Li Keqiang, He Guoqiang and Zhou Yongkang, also attended the gathering.The Spring Festival, or the Chinese Lunar New Year, is the most important traditional festival for China.

BEIJING, Nov. 30 (Xinhua) -- China's efforts to fight AIDS are impressive and its experience can be shared, according to Michel Sidibe, executive director of the Joint United Nations Programme on HIV/AIDS (UNAIDS)."We have seen progress in terms of new infections. The number of people going into treatment is increasing and the mortality rate is going down very quickly in China," Sidibe said during an interview with Xinhua on Wednesday.Sidibe said he was impressed by the country's political leadership and commitment to controlling AIDS.According to UNAIDS, the country has reported a 60-percent reduction in deaths due to AIDS over the past eight years.New HIV infection cases in China have been reduced from 70,000 people annually in 2005 to around 48,000 in 2011, according to the country's health department."However, China's success will not only be measured by what it has done for the Chinese people," Sidibe said.China has successful experience in reducing new HIV infections among intravenous drug users, which can be shared with the rest of the world, particularly east Europe and south Asia where HIV infections among drug abusers is a major challenge, he said.Sidibe suggested that the country should work with the rest of the developing world, particularly Africa, in fighting AIDS.A partnership between China and Africa will make a "big, big difference" in reducing AIDS mortality rates and introducing new technology and perspectives in Africa, said the official who had worked for UN in several African countries for more than two decades.Admitting the challenges of funding AIDS control programs during the current global economic downturn, Sidibe called for global solidarity and increasing shared responsibilities among countries."It is a critical moment now. It is not a time to stop investment but to redouble our efforts, to make sure that we will continue to make progress in the fight against HIV," Sidibe said."Getting to Zero" has been chosen as the main theme of World AIDS Day for the next five years, referring to UNAIDS' vision of "zero new HIV infections, zero discrimination and zero AIDS-related deaths."Sidibe met with Li Congjun, president of the Xinhua News Agency, on Wednesday before the interview. The agency has launched a global media campaign in cooperation with UNAIDS to raise public awareness about HIV/AIDS."The partnership (with Xinhua) is not only about writing news about HIV. It is about helping people to change their attitude and make decisions to help protect themselves," Sidibe said.

NEW YORK, Oct. 14 (Xinhua) -- The iPhone 4S went on sale at Apple store on the Fifth Avenue of Manhattan in New York early Friday.An Apple store worker said people were waiting outside the store around 3 p.m. Thursday and underwent an overnight rain for an early purchase of the smart phone which started sale at 8 a.m. Friday.About 200 people were seen lining up outside the store and some of them said they would like to pay tribute to Steve Jobs, Apple's longtime CEO who died of pancreatic cancer at the age of 56 on Oct. 5."I'm a Steve's fan, iPhone 4S is the best of Steve's work. I am not going to buy iPhone 5,"Jim Bedford, who is in his 30s, said. "Maybe this is my last iPhone," he added.People left a Steve's picture, flowers and apples on the sidewalk to pay respect to Apple's co-founder. Some apples were seen inscribed such words as "Nice job" and "We will always remember you."Tom White, 50, said he had iPhone 1 and 3 and "now is the time to change a new one."The iPhone 4S is operated seven times faster than their predecessor and features an upgraded camera. Apple reported more than 1 million pre-orders for the iPhone 4S, breaking a mark set by last year's model. The phone also went on sale Friday in six other countries -- Britain,Germany,France,Australia, Canada and Japan.

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