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WASHINGTON, Aug. 31 (Xinhua) -- Astronomers using NASA's Chandra X-ray Observatory discovered the first pair of supermassive black holes in a spiral galaxy similar to the Milky Way, NASA announced Wednesday.Approximately 160 million light years from Earth, the pair is the nearest known such phenomenon.The black holes are located near the center of the spiral galaxy NGC 3393. Separated by only 490 light years, the black holes are likely the remnant of a merger of two galaxies of unequal mass a billion or more years ago.Both of the supermassive black holes are heavily obscured by dust and gas, which makes them difficult to observe in optical light. Because X-rays are more energetic, they can penetrate this obscuring material. Chandra's X-ray spectra show clear signatures of a pair of supermassive black holes."If this galaxy weren't so close, we'd have no chance of separating the two black holes the way we have," said Pepi Fabbiano of the Harvard-Smithsonian Center for Astrophysics, who led the study that appeared Wednesday in on-line issue of the journal Nature. "Since this galaxy was right under our noses by cosmic standards, it makes us wonder how many of these black hole pairs we've been missing."Previous observations in X-rays and at other wavelengths indicated that a single supermassive black hole existed in the center of NGC 3393. However, a long look by Chandra allowed the researchers to detect and separate the dual black holes. Both black holes are actively growing and emitting X-rays as gas falls towards them and becomes hotter.When two equal-sized spiral galaxies merge, astronomers think it should result in the formation of a black hole pair and a galaxy with a disrupted appearance and intense star formation. A well-known example is the pair of supermassive black holes in NGC 6240, which is located about 330 million light years from Earth.However, NGC 3393 is a well-organized spiral galaxy, and its central bulge is dominated by old stars. These are unusual properties for a galaxy containing a pair of black holes.

XIAMEN, June 12 (Xinhua) -- Chinese mainland on Sunday announced a raft of measures on tourism, transportation, farmers and food safety to boost Taiwan's economic growth and cross-Strait relations.A pilot plan allowing mainlanders to visit Taiwan as individual tourists will start on June 28, which covers residents of Beijing, Shanghai and southeastern city of Xiamen at the first stage, said Wang Yi, head of the State Council's Taiwan Affairs Office.Wang told a conference at the weeklong Straits Forum being held in Xiamen of Fujian Province that the mainland and Taiwan also agreed to allow Fujian residents to visit the islands of Kinmen, Matsu and Penghu in the Taiwan Strait as individual tourists.Observers predict that the influx of mainland tourists will bring vitality to Taiwan's export-oriented economy which had greatly suffered from the global economic downturn.Currently, mainlanders are only allowed to visit Taiwan on package tours after the authorities lifted a partial ban in July 2008.At Sunday's conference, the two sides also announced to increase the number of cross-Strait passenger flights by more than 50 percent to 558 flights per week, and add terminals for the direct flights in four mainland cities, including one in northwestern city of Lanzhou, which brought the total number of cross-Strait flight terminals to 50 on both sides of the Strait.The moves aim to cope with the increasing number of mainlanders who wish to visit Taiwan.The number of mainland tourists traveling to the island reached 2.34 million as of the end of May, China's top tourism official said at the conference. There are also an increasing number of mainland business travelers and government delegations visiting Taiwan.Meanwhile, both sides agreed to "regulate airfares" for flights from Beijing and Shanghai to Taipei.Currently, the cheapest one-way ticket between Beijing and Taipei on Air China, the mainland's flagship carrier, costs around 1,300 yuan (about 200 U.S. dollars) while a full price one-way ticket costs more than 3,000 yuan, according to the airline's website.Some members of the public on both sides have complained about the high price.For the past decades, travelers had to transfer at other airports, particularly the one in Hong Kong, in order to reach Taiwan by air.In 2003, the two sides agreed to operate charter flights during Spring Festival, China's biggest public holiday.Regular direct flights across the Strait have been available since July 2008 to mainly serve mainland package tourists visiting Taiwan.The mainland also decided to facilitate entry and exit procedures for Taiwan residents and lower charges for endorsing their passports by 50 percent starting from July 1.Meanwhile, four "enterprising parks" will be set up in four cities of Fujian, central Henan and southwestern Guangxi provinces for Taiwan farmers launching agricultural startups on the mainland, said Wang Yi.Both sides also agreed to encourage mainland enterprises to purchase farm produce and other products listed in the early harvest program of the cross-Strait Economic Cooperation Framework Agreement (ECFA) directly in Taiwan.A general manager surnamed Lin of a farm produce company in Taiwan's southern city of Tainan said he hoped to seize the opportunity to benefit from the development of the island's farm and fishing sector as the mainland has become Taiwan's largest export market.Further, both sides agreed to strengthen cooperation and exchanges concerning nuclear power security and food safety.The third Straits Forum, which opened Saturday in Xiamen, facing Taiwan across the Strait, will close in the island's city of Taichung on Friday.

WASHINGTON, Sept. 13 (Xinhua) -- The U.S. Department of Agriculture (USDA) announced Tuesday it will begin testing next year for six more kinds of E.coli bacteria in raw ground beef and tenderized steaks in order to protect the safety of the American food supply.The U.S. currently tests for one strain of E.coli O157:H7 in beef. According to the USDA, from March 5 next year, if the E. coli serogroups O26, O103, O45, O111, O121 and O145 are found in raw ground beef or its precursors, those products will be prohibited from entering commerce.Like E.coli O157:H7, these serogroups can cause severe illness and even death, and young children and the elderly are at highest risk."The Obama Administration is committed to protecting our food supply and preventing illnesses before they happen," said Agriculture Secretary Tom Vilsack in a statement. "Today's announcement does exactly that by targeting and eliminating contaminated products from the market.""Too often, we are caught reacting to a problem instead of preventing it. This new policy will help stop problems before they start," he said.About one in six Americans becomes sick from a food borne illnesses each year, an epidemic that kills about 3,000 annually and hospitalizes 128,000, according to the U.S. Centers for Disease Control and Prevention.

JIUQUAN, Gansu, Aug. 18 (Xinhua) -- China's experimental orbiter SJ-11-04, which was launched by a Long March II-C rocket Thursday, failed to enter the designated orbit due to a malfunction of the rocket.The rocket experienced malfunction during the flight following its launch from Jiuquan Satellite Launch Center at 5:28 p.m. Beijing Time in northwest Gansu Province.The specific cause of the failure is being analyzed.

BERLIN, June 6 (Xinhua) -- The German authorities said on Monday that Germany's first sample tests of the allegedly contaminated bean sprouts have found no E. coli strains that have sickened more than 2,000 people in Europe.According to a statement issued by the Agriculture Ministry of the Lower-Saxony state, 23 of 40 samples concerning the suspected sprouts from a market garden in the state have tested negative, and further tests are still pending."Based on the initial findings in tests of some of the samples, especially the seeds, we assume that intensive analytical efforts are needed to prove that the suspected pathogen is really there," the statement said.Beansprouts and salad sprouts are seen in this picture illustration taken in Berlin June 6, 2011.  The German authorities said on Monday that Germany's first sample tests of the allegedly contaminated bean sprouts have found no E. coli strains that have sickened more than 2,000 people in EuropeLower-Saxony's Agriculture Minister Gert Lindemann said Sunday that a market garden in the rural district of Uelzen had provided a connection "involving all the main outbreaks" of the disease.Restaurants and food outlets of almost all E. coli-affected areas had received shipments of sprouts directly or indirectly from the company, state officials said.The German authorities have been racing to track down the source of the pathogen since the outbreak, which has infected people in 12 countries, all of whom had once traveled in northern Germany.More than 600 of those infected have developed Hemolytic Uremic Syndrome, a potentially deadly complication attacking the kidneys.The E. coli source was first thought to be cucumbers from Spain, which has caused huge loses for Spain farmers. However, this conclusion was overthrown by laboratory tests in Hamburg later.

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