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WASHINGTON, Dec. 5 (Xinhua) -- NASA's Kepler mission has confirmed its first planet in the "habitable zone," a region where liquid water could exist on a planet's surface, the U.S. space agency announced on Monday.The newly-confirmed planet, Kepler-22b, is the smallest yet found to orbit in the middle of the habitable zone of a star similar to Sun. The planet is about 2.4 times the radius of Earth. Scientists don't yet know if Kepler-22b has a predominantly rocky, gaseous or liquid composition, but its discovery is a step closer to finding Earth-like planets.Previous research hinted at the existence of near-Earth-size planets in habitable zones, but clear confirmation proved elusive. Two other small planets orbiting stars smaller and cooler than Sun recently were confirmed on the very edges of the habitable zone, with orbits more closely resembling those of Venus and Mars.Kepler-22's star is a bit smaller than our sun, so its habitable zone is slightly closer in. The diagram shows an artist's rendering of the planet comfortably orbiting within the habitable zone, similar to where Earth circles the sun. Kepler-22b has a yearly orbit of 289 days. The planet is the smallest known to orbit in the middle of the habitable zone of a sun-like star. It's about 2.4 times the size of Earth."This is a major milestone on the road to finding Earth's twin, " said Douglas Hudgins, Kepler program scientist at the NASA Headquarters in Washington. "Kepler's results continue to demonstrate the importance of NASA's science missions, which aim to answer some of the biggest questions about our place in the universe."Kepler discovers planets and planet candidates by measuring dips in the brightness of more than 150,000 stars to search for planets that cross in front, or "transit," the stars. Kepler requires at least three transits to verify a signal as a planet."Fortune smiled upon us with the detection of this planet," said William Borucki, Kepler principal investigator at the NASA Ames Research Center who led the team that discovered Kepler-22b. "The first transit was captured just three days after we declared the spacecraft operationally ready. We witnessed the defining third transit over the 2010 holiday season."The Kepler science team uses ground-based telescopes and the Spitzer Space Telescope to review observations on planet candidates the spacecraft finds. The star field that Kepler observes in the constellations Cygnus and Lyra can only be seen from ground-based observatories in spring through early fall. The data from these other observations help determine which candidates can be validated as planets.Kepler-22b is located 600 light years away. While the planet is larger than Earth, its orbit of 290 days around a Sun-like star resembles that of Earth. The planet's host star belongs to the same class as Sun, called G-type, although it is slightly smaller and cooler.Of the 54 habitable-zone planet candidates reported in February 2011, Kepler-22b is the first to be confirmed. This finding will be published in The Astrophysical Journal.

BEIJING, Jan. 21 (Xinhua) -- The State Grid Corporation of China (SGCC), the country's largest electric power transmission and distribution company, said Saturday that the power supply will be sufficient during the upcoming Spring Festival holiday.Thermal power plants currently have 89.34 million tonnes of coal, which is enough for 20 days of power generation.Meanwhile, the country's electricity consumption is expected to fall by 40 percent during the holiday which lasts from Jan. 22 to Jan. 28, as many factories suspend production during the period, SGCC said.The company said it will keep a close eye on the cold weather, strengthen inspections and maintenance of high-voltage grids, and take precautions to minimize the impact of snow and freezing rain on power transmission.

BEIJING, Jan. 3 (Xinhua) -- China's building materials showed different momentum of growth in November 2011, with a slowing cement output growth and a speeding plate glass, according to latest statistics from the country's top economic planner.Cement output growth in November 2011 stood at 11.2 percent year-on-year, 6.1 percentage points lower than previous year, while plate glass production expansion reached 7.1 percent year-on-year, quickening by by 0.5 percentage points from previous year.Still, China's cement output reached 1.89 trillion tonnes in the first 11 months of last year, an increase 17.2 percent year-on-year, 1.6 percentage points faster than previous year.The output of flat glass, a sector fraught with overcapacity and duplicated construction problems, rose 17 percent year-on-year to 6.82 trillion weight boxes in the January-November period of last year, according to the NDRC.Profits of China's building materials industry surged 53.1 percent year-on-year to 243.7 billion yuan (38.68 billion U.S. dollars) in the first 11 months of 2011.To curb the overcapacity and repeated construction in the flat glass sector, the NDRC said in a statement in October 2011 that it would take move nationwide to clear up projects for construction of flat glass production facilities.

BEIJING, Nov. 1 (Xinhua) -- The ministers of Brazil, South Africa, India and China (BASIC) in a Tuesday joint statement urged developed nations to fulfill their commitments and provide funds and technology to help developing nations tackle climate change.Developed nations should honor their commitments, made at the Copenhagen climate change conference in 2009, to provide 100 billion U.S. dollars annually by 2020 and ensure that there will be no funding gaps from 2013 to 2020, according to the statement.Developed nations should also fulfill their pledge to offer 30 billion U.S. dollars in "fast-start funding" to developing nations in order to help them address climate change, the statement said.The ministers agreed that the coming Durban climate change conference should achieve a "comprehensive, fair and balanced outcome" under the principle of common but differentiated responsibility.They called on the conference to clearly establish the second commitment period under the Kyoto Protocol, during which developed country parties to the Kyoto Protocol should undertake quantified emission reduction commitments.The Kyoto Protocol is the cornerstone of climate change and its second commitment period is an essential priority for the success of the Durban conference, according to the statement.H The joint statement was issued following a two-day meeting of ministers from the four nations, also known as the ninth BASIC Ministerial Meeting on Climate Change, a mechanism through which the four countries and other developing countries coordinate their efforts in climate change.Representatives of Group 77 countries, island countries and the Arab League also attended the meeting.The Durban conference is scheduled for November. The focus of the conference is expected to be the extension of the Kyoto Protocol and acquiring a commitment from developed countries for the protocol's next period.The Kyoto Protocol, an international agreement linked to the United Nations Framework Convention on Climate Change, sets binding targets for 37 industrialized countries and the European community for reducing greenhouse gas emissions from 2008 to 2012.

BEIJING, Jan. 1 (Xinhua) -- President Hu Jintao, along with other Chinese leaders, celebrated the New Year with political advisors Sunday morning in Beijing and delivered an important speech.Hu and the other members of the Standing Committee of the Political Bureau of the Communist Party of China (CPC) Central Committee Wu Bangguo, Wen Jiabao, Jia Qinglin, Li Changchun, Xi Jinping, Li Keqiang, He Guoqiang and Zhou Yongkang attended a tea party held by the National Committee of the Chinese People's Political Consultative Conference (CPPCC).The party was presided over by Jia Qinglin, chairman of the CPPCC National Committee.The leaders were joined by senior members of the central committees of non-Communist parties and the All-China Federation of Industry and Commerce, personages without party affiliation, officials of the central government and representatives from all walks of life and all ethnic groups in Beijing.