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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.

SAN FRANCISCO, Oct. 13 (Xinhua) -- The Internet search giant Google on Thursday released its third fiscal quarter earnings report, posting strong numbers that beat analysts' estimates.The Mountain View, California-based company reported revenue of 9.72 billion U.S. dollars for the quarter ending Sept. 30, 2011, an increase of 33 percent on a year-on-year basis.Google reported a profit of 2.73 billion dollars, compared to 2. 17 billion dollars in the same period last year. The earning per share, excluding certain items, is 9.72 dollars, topping the average estimate of 8.74 dollars per share polled by Thomson Reuters."We had a great quarter," said Google co-founder and Chief Executive Officer Larry Page in a statement. "Google+ is now open to everyone and we just passed the 40 million user mark. People are flocking into Google+ at an incredible rate and we are just getting started."Many analysts took the third quarter to examine the company's progress towards expanding its core business beyond advertising which accounted for 96 percent of its revenue last year. In the past quarter, Google made major investments in several key businesses, such as social networking and mobile.In August, Google announced a 12.5-billion-dollar acquisition of Motorola Mobility, a move widely seen to get Motorola's patent portfolio to protect its Android software against a growing number of infringement lawsuits by rival mobile platforms. The deal is expected to close later this year or early next year.Since its late-June launch, the Google+ social network has been receiving a good response, posing to shake up the social networking space dominated by Facebook.In September, Google also officially launched Google Wallet, a mobile payment allowing users to pay by tapping an Android smartphone against a compatible card reader.

BEIJING, Oct. 14 (Xinhuanet) -- Materialism could be harmful to marriage, according to a new study published in the American Journal of Couple & Relationship Therapy Thursday.The researchers collected online "relationship assessment" questionnaires from 1,734 U.S. married couples.The questionnaire covered the topics about the couples' marital satisfaction, conflict patterns, marital communication, and marriage stability, and so on.Non-materialistic couples were about 10 to 15 percent better than those materialistics in their marital satisfaction, marriage stability and conflict levels, according to the study."What we found was a general pattern that materialism seems to be harmful to marriage," said study researcher Jason Carroll, a professor of family life at Brigham Young University.It didn't matter whether the materialistic spouse was the man or the woman, he added.However, materialism is not simply black-or-white: some couples can pursue their fortune and keep their relationship strong at the same time, the researcher suggested.But breaking their materialistic thought would be helpful for most couples, Carroll concluded.

PARIS, Oct. 1 (Xinhua) -- People come to the French capital will be able to enjoy a new public service by leasing electric cars in the urban region from Sunday.This car-sharing system is aimed to reduce the number of private cars as well as restrain pollution, according to the Paris municipal government.The plan, dubbed "the Autolib" system, is similar to already functioning "velib system" which is a large-scale public bicycle sharing system in Paris launched in 2007.The first experimental stage of the Autolib project is said to last two month with 66 cars at 33 stations around the city.Costumers can pay between 5 euros and 7 euros (6.7-9.4 U.S. dollars) for every half-hour use or register for a yearly, weekly or 24-hour package with different cost and necessary identity cards, driving licences and an uncashed deposit.Once fully charged, the four-seated "Bluecar" can reach a top speed of 130 km an hour and has a range of 250 km with a single charge.In order to encourage short journey rather than long trip around the capital, Paris administration wants to expand the system to a 250-car team by this December, and then to 2,000 by next summer.

WASHINGTON, Dec. 12 (Xinhua) -- British scientists have discovered a new way to target cancer through manipulating a master switch responsible for cancer cell growth. The findings, published Monday in the U.S. journal Cancer Cell, reveal how cancer cells grow faster by producing their own blood vessels.Cancer cells gain the nutrients they need by producing proteins that make blood vessels grow, helping deliver oxygen and sugars to the tumor. These proteins are vascular growth factors like VEGF -- the target for the anti-cancer drug Avastin. Making these proteins requires the slotting together of different parts of genes, a process called splicing.Scientists at the University of West England and the University of Bristol discovered that mutations in one specific cancer gene can control how splicing is balanced, allowing a master switch in the cell to be turned on. This master switch of splicing makes cancer cells grow faster, and blood vessels to grow more quickly, as they alter how VEGFs are put together.In experimental models, the researchers found that by using new drugs that block this master switch they prevented blood vessel growth and stopped the growth of cancers."The research clearly demonstrates that it may be possible to block tumor growth by targeting and manipulating alternative splicing in patients, adding to the increasingly wide armory of potential anti-cancer therapies," the authors said.