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BEIJING, May 20 (Xinhuanet) -- Scientists have discovered a Jupiter-sized exoplanet that is completely unbound from a host star, according the scientific journal "Nature" published Thursday.The research was conducted by astrophysicists from Osaka University in Japan.Using the technique called "gravitational microlensing", scientists turned their telescopes towards the centre of the Milky Way and detected this "lonely planet" moving in a extremely large orbit, which suggested it does not connect to any solar system.Then they estimated the total number of such wondering planets could be as many as 400 billion, based on the detection efficiency. This number far outnumbers the main-sequence stars such as our Sun."This is an amazing result, and if it is right, the implications for planet formation are profound," says astronomer Debra Fischer at Yale University in New Haven, Connecticut.And scientist began to consider the possibility that liquid water could exist on this kind of unbound planets. "That might be an attractive possibility for life," said David Stevenson, a planetary scientist at the California Institute of Technology.

SAN FRANCISCO, May 25 (Xinhua) -- Micro-blogging service Twitter on Wednesday confirmed that it has bought TweetDeck, a London-based startup that develops application to help people organize information posted on Twitter."Today, we're pleased to announce that the TweetDeck team has joined Twitter," Dick Costolo, Twitter's chief executive officer (CEO), said in a blog post."This acquisition is an important step forward for us. TweetDeck provides brands, publishers, marketers and others with a powerful platform to track all the real-time conversations they care about," he added.Founded in 2008, TweetDeck now has a team of 15 and offers a real-time application that allows users to monitor abundance of information from social media services including Twitter in a single concise view."Change may well be inevitable, but we remain the same team, staying in London, with the same focus and products, and now with the support and resources to allow us to grow and take on even bigger challenges," Iain Dodsworth, founder and CEO of TweetDeck, noted in a separate blog post.The deal is a defensive move for Twitter aimed at preventing TweetDeck from being purchased by rivals, some analysts said.Financial terms of the transaction were not disclosed, but technology blog site TechCrunch and other U.S. media reported that Twitter paid 40 million to 50 million U.S. dollars.

BEIJING, Feb. 12 (Xinhua) -- A delegation of the Chinese People's Political Consultative Conference (CPPCC) left Beijing Saturday evening to visit Ghana, Rwanda and Mozambique.The delegation, led by Vice Chairman Li Zhaozhuo of the CPPCC National Committee, was invited by the Parliament of Ghana, the Rwandan Chamber of Deputies and the Parliament of Mozambique.

BEIJING, Feb. 15 (Xinhua) -- Chinese Vice Premier Wang Qishan told a U.S. business delegation Tuesday that China would create a sound environment for business cooperation between the two countries.Praising the contribution of U.S. businesses to the sound development of China-U.S. relations, Wang said more exchanges between business people from the two countries would help promote bilateral trade cooperation.Chinese Vice Premier Wang Qishan (C front) poses for a group photo with members of a visiting U.S. business delegation headed by John Mack, chairman of Morgan Stanley, in Beijing, capital of China, Feb. 15, 2011. Executive chairman of Morgan Stanley and chief delegate John Mack said the U.S. business community would increase exchanges and cooperation with Chinese counterparts and play a positive role in the sound development of bilateral relations.The delegation, composed of the heads of many major U.S. companies, including General Motors, is visiting China from Feb. 13 to 16 for unofficial exchanges with Chinese businesses, including China National Offshore Oil Corporation and CITIC Group, according to the China Council for the Promotion of International Trade.

BEIJING, Feb. 8 (Xinhua) -- China would continue expanding its radio and television networks coverage in the country's rural areas in the 2011-2015 period, according to the State Administration of Radio, Film and Television (SARFT).In the five-year period, efforts would focus on ensuring access to radio and TV services in those villages with less than 20 households, the SARFT said in a statement.It noted that China's other villages which had more than 20 households were already covered by the radio and TV networks, thanks to government's continuous efforts in this regard.China's central and local governments poured over 15.7 billion yuan (2.38 billion U.S. dollars) into the upgrading of the radio and TV networks in the country's rural areas in 2006-2010.Official figures indicated that 96.31 percent and 97.23 percent of China's population had access to radio and TV services respectively in 2009. The ratio was 86.02 percent and 87.68 percent respectively in 1997.