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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.

OTTAWA, Nov. 21 (Xinhua) -- The leader of World Health Organization (WHO) Margaret Chan said in Canada on Monday that countries must make the health of women and children their highest priority.Speaking at a luncheon in Gatineau, Quebec, Chan said that maternal and infant health is the most pressing public health issue in the world.She made the remarks just hours after WHO announced Chan was the only candidate for the position on WHO director-general when Chan's appointment expires next year.An executive board meeting in Geneva between Jan. 16 and 23 will decide whether to put the name forward to the WHO Assembly in May, which would make the final decision regarding the appointment.Chan, a former health chief in China's Hong Kong, was elected director-general of the WHO in Nov. 2006.Before her tenure with WHO, Chan was head of public health in Hong Kong, where she managed the city's response to the world's first outbreak of the deadly H5N1 bird flu virus and an outbreak of Severe Acute Respiratory Syndrome (SARS).Speaking in Gatineau, Chan, who earned her medical degree in Canada, said that she never expected to rise to such a lofty position."I just wanted to be a doctor. I just wanted to take care of women and children. When I was studying in Canada, I thought I would get married and have children. I never guessed I'd do anything like head the World Health Organization," she said.She said that she will continue to focus the WHO's attention on mothers and young children.Chan said that it's difficult to know how many mothers and young children die of preventable diseases, since more than 80 countries don't keep accurate death records, but she said that millions of children under five years of age are dying.Millions more are growing up physically and mentally stunted because of poor nutrition and medical care, she added."Without proper nutrition, the stunting we are seeing is horrific," she said. Unless babies have good food, including being breast-fed as infants, they grow up physically and mentally under-developed, Chan said."The first few years of a child's life are make or break," she said.Chan and the WHO held a meeting of the Expert Panel on Maternal and Child Health in Canada from Nov. 18 to Nov. 21. The panel was established by the United Nations Commission on Information and Accountability for Women's and Children's Health Report. At the invitation of the WHO, the Commission was co-chaired by Canada's Prime Minister Stephen Harper and the President of Tanzania, Dr. Jakaya Kikwete.Chan says she's hopeful funding from developed nations will continue to expand, despite the debt crisis facing many of them. The situation resembles the 1970s, with spikes in energy and food prices along with cuts to national budgets to restrain debt.Chan said she is relieved the International Monetary Fund will not press for public health cuts in countries that are struggling with debt.Beverley J. Oda, Minister of International Cooperation who is responsible for Canada's official aid affairs, delivered remarks at the luncheon on improving the health of children and mothers locally and globally."I am particularly proud of the strong partnership between the WHO and Canada in advancing global health, and working towards improvements that will help us achieve our shared goals," she said.Last Friday, Oda announced 25 new initiatives to further Canada 's support to 23 projects in Africa concerning Children and Youth, Food Security and Sustainable Economic Growth.Seven of these are multi-country projects supporting efforts to prevent the mother-to-child transmission of HIV/AIDS, further improving child health, or increasing the capacity of African Regional Technical Centres. The others are targeted to support work in a range of individual African countries by working with Canadian, international and African-based organizations.

BEIJING, Oct. 28 (Xinhuanet) -- Taking aspirin everyday may lower the risk of developing colon cancer for people with the cancer-causing genes, researchers found.The finding was published on Friday in the British medical journal "Lancet".The researchers followed 508 patients with Lynch syndrome, an inherited disorder which increases the risk of developing colon and other cancers.These patients were divided into two groups: members in one group took 600 mg aspirins everyday; another group took only the dummy pills.After 4 years, 10 colon cancer cases were reported among 258 patients who took daily aspirins for at least two years, comparing with 23 cases among 250 patients on dummy pills."This is good news for a very specific population," said Asad Umar, a cancer prevention expert at the U.S. National Cancer Institute.However, the finding doesn't apply to the general public, suggested the lead author of the study John Burn, a geneticist at Newcastle University in England.Only those who are at risk of such diseases should consider taking aspirin regularly, such as people having a family history of colon cancer, he added.

BEIJING, Jan. 7 (Xinhua) -- The two-day National Financial Work Conference concluded Saturday, laying out development plans for the financial sector in the coming five years, according to a statement released after the meeting.Chinese Premier Wen Jiabao was present at the conference and delivered a keynote speech.Such a conference is held every five years. Similar meetings were held in 1997, 2002 and 2007.

BEIJING, Jan. 05 (Xinhuanet) -- China's satellite television channels have aired fewer entertainment programs this year as broadcasting watchdog's curbs on "excessive entertainment" took effect.The State Administration of Radio, Film and Television has cut two-thirds of "racy" entertainment programs on China's 34 satellite channels since the campaign began, the spokesperson for the administration said on Tuesday.Since the regulation took effect on Jan 1, the total number of entertainment programs scheduled for prime-time -7:30 pm to 10 pm - broadcast a week dropped to 38 from 126 at the end of last year, according to a statement from the administration.Under the regulation, announced in October, each satellite channel can broadcast no more than two entertainment programs a week and the maximum length of the program may not exceed 90 minutes.The targeted programs, including dating shows, reality talent shows and emotional stories on the administration's list, were deemed "excessive entertainment" and showing "less taste"."Satellite channels should design programs with innovative content, promoting traditional virtues and socialist core values in their new entertainment programs," the authority said.The administration considers the move crucial to improving cultural content for the public by offering high-level programs.Meanwhile, the number of news programs on the satellite channels has grown to 193 a day, 33 percent more than in 2011.Currently, news programming on each satellite channel has surpassed two hours, and each channel has at least two 30-minute news programs during prime time.But popular dating shows such as If You Are the One, produced by Jiangsu Satellite TV, and reality shows such as China's Got Talent, aired by Shanghai-based Dragon TV, will remain on during prime time in the weekend.Li Hao, spokesman for Hunan Satellite TV, a broadcaster famous for its entertainment programs, told China Daily the regulation will improve the quality of entertainment programs."We have been exploring how to make entertainment shows more meaningful and valuable," he said, adding that the channel has shortened the length of its two entertainment programs from 110 to 90 minutes."We will supervise programs more strictly, and pay close attention to things such as the clothing and comments of hosts and guests," he added.Cheng Manli, a media professor at Peking University, welcomed the new regulation to limit "less tasteful" programs involving violence and money worship."After all, unhealthy programs may hurt young people who are not able to distinguish right from wrong, which also worries their parents," she said.However, Yu Guoming, a professor at the School of Journalism at Renmin University of China, did not think the regulation was the way to improve cultural development."Whether the entertainment program is good or not should be decided by viewers' reaction, instead of an administration's evaluation," he said. "Residents are under pressure and need to watch shows to relax in our society."Yu also said that a good entertainment program should respect residents' taste and give them more viewing choices, or else it could lead to rigid restrictions.Ma Yuqiang, who runs an online clothing retail company, said the new rule will not affect his daily life, because he can watch the entertainment programs that were taken off prime time on the Internet."I think the regulation will drive most young people to the Internet," Ma, 26, said.

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