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LOS ANGELES, May 2 (Xinhua) -- An asteroid will fly past Earth this fall at a close approach that will allow a close-up view of one of Earth's good-sized space rocks, NASA's Jet Propulsion Laboratory (JPL) announced on Monday."On November 8, asteroid 2005 YU55 will fly past Earth and at its closest approach point will be about 325,000 kilometers away," said Don Yeomans, manager of NASA's Near-Earth Object Program Office at the JPL in Pasadena, Los Angeles."This asteroid is about 400 meters wide -- the largest space rock we have identified that will come this close until 2028."Despite the relative proximity and size, "YU55 poses no threat of an Earth collision over, at the very least, the next 100 years, " Yeomans said in a press release."During its closest approach, its gravitational effect on the Earth will be so miniscule as to be immeasurable. It will not affect the tides or anything else.""While near-Earth objects of this size have flown within a lunar distance in the past, we did not have the foreknowledge and technology to take advantage of the opportunity," said Barbara Wilson, a scientist at JPL. "When it flies past, it should be a great opportunity for science instruments on the ground to get a good look.""The best resolution of the radar images was 7.5 meters per pixel," said JPL radar astronomer Lance Benner. "When 2005 YU55 returns this fall, we intend to image it at 4-meter resolution with our recently upgraded equipment at the Deep Space Network at Goldstone, California. Plus, the asteroid will be seven times closer. We're expecting some very detailed radar images."Asteroid 2005 YU55 was discovered in December 2005 by Robert McMillan, head of the NASA-funded Spacewatch Program at the University of Arizona, Tucson. The space rock has been in astronomers' crosshairs before.In April 2010, Mike Nolan and colleagues at the Arecibo Observatory in Puerto Rico generated some ghostly images of 2005 YU55 when the asteroid was about 2.3 million kilometers from Earth.

BEIJING, May 24 (Xinhuanet) -- CT scan, a widely used heart-imaging test, is likely to result in the over treatment for patients with heart disease, according to a study published online by the Archives of Internal Medicine on Monday.CT, which produces a detailed image of the heart that reveals cholesterol buildups in the coronary arteries, is widely used in the hospital around the world."Testing might lead to more harm than good," said McEvoy, a doctor at Seoul National University Bundang Hospital in S. Korea.His team led the study, in which 2,000 healthy adults were divided into two groups. One thousand adults had CT scans and another half had standard tests, including routine checks of their blood pressure and cholesterol levels.After 18 months, the 215 people who had worrisome CT scans were advised to have additional tests and medical treatment, and some even advised to have surgery. But less than 10 percent in the group of standard test were reported to need medications.Therefore, physicians cannot easily ignore the diagnoses made by the new imaging techniques, McEvoy said, "We are left with the dilemma of what to do with the results,"According to McEvoy, doctors should focus on patients' lifestyle and traditional risk factors such as smoking and obesity.

BEIJING, Feb. 25 (Xinhua) -- China's top legislature on Friday ended its bimonthly session, adopting a series of bills including a law on vehicle and vessel taxation, which is aimed at standardizing taxation and promoting environmental awareness and energy efficiency.The National People's Congress (NPC) Standing Committee also voted to adopt an amendment to the Criminal Law which reduces the number of crimes punishable by death by 13 to 55.Moreover, it passed the country's first law on intangible cultural heritage protection, which is expected to better preserve heritages of historic, literary, artistic or scientific value.At the session that opened on Wednesday, lawmakers validated the dismissal of Liu Zhijun from his post as the railways minister and appointed Sheng Guangzu, the former head of the General Administration of Customs, to replace Liu.The discipline watchdog of the Communist Party of China (CPC) said on Feb. 12 that Liu was under investigation for alleged "severe violation of discipline," while the CPC Central Committee's Organization Department said he had been removed from the post of the ministry's Party chief.Wu Bangguo, chairman of the NPC Standing Committee, said at the closing of the bimonthly session that the democratic rights of NPC members should be fully respected and guaranteed during the upcoming NPC plenary session.On Friday afternoon, the members of the NPC Standing Committee attended a lecture on China's water conservancy development.

The severe water shortages have become a major bottleneck to our sustainable development. Nearly two-thirds of the cities in China lack water," said Chen Lei, Minister of Water Resources.From 2011 to 2015, China will strive to limit its annual water consumption within 620 billion cubic meters and cut water consumption per 10,000 yuan of GDP by 30 percent.

BEIJING, Feb. 25 (Xinhua) -- China's top legislature on Friday ended its bimonthly session, adopting a series of bills including a law on vehicle and vessel taxation, which is aimed at standardizing taxation and promoting environmental awareness and energy efficiency.The National People's Congress (NPC) Standing Committee also voted to adopt an amendment to the Criminal Law which reduces the number of crimes punishable by death by 13 to 55.Moreover, it passed the country's first law on intangible cultural heritage protection, which is expected to better preserve heritages of historic, literary, artistic or scientific value.At the session that opened on Wednesday, lawmakers validated the dismissal of Liu Zhijun from his post as the railways minister and appointed Sheng Guangzu, the former head of the General Administration of Customs, to replace Liu.The discipline watchdog of the Communist Party of China (CPC) said on Feb. 12 that Liu was under investigation for alleged "severe violation of discipline," while the CPC Central Committee's Organization Department said he had been removed from the post of the ministry's Party chief.Wu Bangguo, chairman of the NPC Standing Committee, said at the closing of the bimonthly session that the democratic rights of NPC members should be fully respected and guaranteed during the upcoming NPC plenary session.On Friday afternoon, the members of the NPC Standing Committee attended a lecture on China's water conservancy development.