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LOS ANGELES, April 7 (Xinhua) -- Using NASA's Galaxy Evolution Explorer (GEE) satellite, U.S. astronomers are hunting for nearby, hard-to-see stars which could very well be home to the easiest-to-see alien planets, it was announced on Thursday.U.S. astronomers are ferreting out the new targets after the glare of bright, shining stars has frustrated most efforts at visualizing distant worlds, NASA's Jet Propulsion Laboratory (JPL) said.So far, only a handful of distant planets, or exoplanets, have been directly imaged. Small, newborn stars are less blinding, making the planets easier to see, but the fact that these stars are dim means they are hard to find in the first place."Fortunately, the young stars emit more ultraviolet light than their older counterparts, which makes them conspicuous to the ultraviolet-detecting GEE," JPL said in a press release."We've discovered a new technique of using ultraviolet light to search for young, low-mass stars near the Earth," said David Rodriguez, a graduate student of astronomy at University of Californian, Los Angeles. "These young stars make excellent targets for future direct imaging of exoplanets."Young stars, like human children, tend to be a bit unruly -- they spout a greater proportion of energetic X-rays and ultraviolet light than more mature stars. In some cases, X-ray surveys can pick out these youngsters due to the "racket" they cause. However, many smaller, less "noisy" baby stars perfect for exoplanet imaging studies have gone undetected except in the most detailed X-ray surveys. To date, such surveys have covered only a small percentage of the sky, according to JPL in Pasadena, Los Angeles.Rodriguez and his team figured that the GEE, which has scanned about three-quarters of the sky in ultraviolet light, could fill this gap.Astronomers compared readings from the telescope with optical and infrared data to look for the telltale signature of rambunctious junior stars. Follow-up observations of 24 candidates identified in this manner determined that 17 of the stars showed clear signs of youth, validating the team's approach, JPL said."The Galaxy Evolution Explorer can readily select young, low- mass stars that are too faint to turn up in all-sky X-ray surveys, which makes the telescope an incredibly useful tool," Rodriguez said in the release.

BEIJING, March 10 (Xinhuanet) -- The price of preventing preterm labor is about to rise drastically in the U.S. next week.A drug for high-risk pregnant women costs about 10 to 20 dollars per injection. Next week, the price will shoot up to 1,500 dollars a dose, according to media reports Wednesday.This means the total cost during a pregnancy could be as much as 30,000 dollars.The massive increase comes after KV Pharmaceutical of St. Louis won an exclusive government license to produce the drug, known as Makena.The drug, a form of progesterone given as a weekly shot, has been made cheaply for years by unlicensed chemists.The March of Dimes and many obstetricians supported the move because it means quality will be more consistent and it will be easier to get, but none of them has anticipated the sharp price hike.Doctors and campaign groups have been caught out by the move, saying that the price hike may deter low-income women from getting the drug, leading to more premature births.

CHANGCHUN, Jan. 22 (Xinhua) -- Chinese Vice President Xi Jinping stressed political integrity as the most important criteria in electing Communist Party cadres, during his three-day inspection tour in northeast Jilin province, which ended Saturday.The standards of political integrity and professional competence, with the former being the most important, should be strictly observed in the upcoming election of the new term for Party Committee members at provincial, city, county and township levels, Xi, a Standing Committee member of the Communist Party of China (CPC) Central Committee Political Bureau, said.During his meeting with leaders of the provincial Party Committee and provincial government of Jilin, Xi said efforts should be made to reinforce the notion of putting people first and exercising the state power for the people among carders.Chinese Vice President Xi Jinping (2nd L front) talks with a staff member at a workshop of FAW car factory in Changchun, capital of northeast China's Jilin Province, Jan. 21, 2011. Xi made an inspection tour in Jilin from Jan. 20 to 22.While visiting a community Party organization, Xi also asked grass-roots Party organizations to give priority to building a closer bond with the public and serving the public.During his visit to several companies, including Changchun-based First Automobile Works, Xi called for efforts to develop technology-intensive industries and the manufacturing of high-end products to promote economic restructuring.He also visited flood-hit areas to observe the relocation of flood victims and reconstruction work. Jilin Province was hit by unprecedented floods last July and August.He asked local governments to rebuild flood-damaged homes as soon as possible and repair those destroyed water conservancy projects and encourage farmers to grow crops on flooded lands.

CANBERRA, May 26 (Xinhua) -- Australian Health Minister Nicola Roxon on Thursday night said she will not be frightened off by the tobacco industry's attempt to lobby Malaysia to oppose the Australian government's proposal for plain packaging of cigarettes.According to ABC News, big tobacco companies have appointed a former United States ambassador to the World Trade Organization ( WTO), Peter Allgeier, to help them fight the Australian federal government's plain packaging plan, which is due to come into effect this year.An email sent to a Malaysian official and obtained by ABC News showed that Allgeier had a meeting with Malaysia's trade minister before, and he has been lobbying a Malaysian administrator to put pressure on Australia over plain packaging.Allgeier's email also stated that "members of the U.S. congress also have written to the Australian Government outlining concerns about the implications of plain packaging for the integrity of Australia's trade commitments."However, Roxon, who said she has not been approached by Malaysia on the issue, said Allgeier's appointment demonstrated just how far big tobacco is prepared to take its fight."But we won't be frightened off because big tobacco is hiring lobbyists or looking at ways to influence the action we're taking, " she told ABC television on Thursday night.The tobacco industry has already spent millions fighting plain packaging, and last year gave 5.2 million U.S. dollars to the Alliance of Australian Retailers (AAR) to fund an advertising campaign against the plan.If the cigarettes law is enforced, Australia will become the first country in the world to ban logos and brand names from cigarette packaging. Health warnings and the kind of graphic pictures will make up the majority of the packaging, while the rest of the packets will be plain olive green.

BEIJING, May 10 (Xinhuanet) -- Professional social networking site LinkedIn is aiming for a valuation of 3.3 billion U.S. dollars for its initial public offering, media reports said Tuesday.The Mountain View, California-based company is expected to begin trading on the New York Stock Exchange within the next month and will use the symbol "LNKD."It plans to offer 7.84 million shares priced at 32 dollars to 35 dollars each, according to the filing, which it submitted to the Securities and Exchange Commission.LinkedIn, which has more than 100 million members in over 200 countries and territories, is seeking to raise as much as 274.4 million dollars from the initial public offering (IPO) with 146.6 million dollars going to the company itself.In 2010, LinkedIn made 15 million dollars in profit on 243 million dollars in revenue, according to the filing.LinkedIn's biggest shareholder is its founder and chairman, Reid Hoffman, who owns more than 21 percent of the company.

来源：资阳报