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LOS ANGELES, April 8 (Xinhua) -- NASA's Wide-field Infrared Survey Explorer (WISE) has discovered a rare asteroid that traces out a horseshoe shape relative to Earth, the Jet Propulsion Laboratory (JPL) said on Friday.Unlike most near-Earth asteroids (NEAs) that have eccentric, or egg-shaped, orbits that take the asteroids right through the inner solar system, the new object has an orbit that is almost circular such that it cannot come close to any other planet in the solar system except Earth, JPL said.However, even though the asteroid rides around with Earth, it never gets that close, said JPL in Pasadena, Los Angeles.As the asteroid approaches Earth, the planet's gravity causes the object to shift back into a larger orbit that takes longer to go around the sun than Earth. Alternately, as Earth catches up with the asteroid, the planet's gravity causes it to fall into a closer orbit that takes less time to go around the sun than Earth, according to JPL.The asteroid therefore never completely passes our planet. This slingshot-like effect results in a horseshoe-shaped path as seen from Earth, in which the new object, designated 2010 SO16, takes 175 years to get from one end of the horseshoe to the other, JPL said."The origins of this object could prove to be very interesting, " said Amy Mainzer of JPL, the principal investigator of NEOWISE, which is the asteroid- and comet-hunting portion of the WISE survey mission. "We are really excited that the astronomy community is already finding treasures in the NEOWISE data that have been released so far."JPL manages and operates the WISE for NASA's Science Mission Directorate, Washington.

SAN FRANCISCO, May 4 (Xinhua) -- Intel Corp. on Wednesday announced that it will mass-manufacture chips using new transistors featuring a three-dimensional (3-D) structure, calling it a technical breakthrough in microprocessors.The 3-D transistor, called Tri-Gate, represents a fundamental departure from the two-dimensional planar transistor structure that has powered computers, mobile phones and other modern electronics, Intel said."Intel's scientists and engineers have once again reinvented the transistor, this time utilizing the third dimension," Paul Otellini, Intel's chief executive officer, said in a statement.Intel on Wednesday also demonstrated a 22-nanometer (nm) microprocessor, codenamed "Ivy Bridge," which will be the first high-volume chips to use the new 3-D transistors.Ivy Bridge is scheduled for high-volume production readiness by the end of this year, the company said.According to Intel, the 3-D transistors enable chips to operate at lower voltage with lower leakage compared to previous transistors, providing up to 37 percent performance increase at low voltage versus the company's 32nm planar transistors.The gain means that the new 3-D transistors are ideal for use in small handheld devices, which operate using less energy to " switch" back and forth, Intel noted.

BEIJING, Feb. 26 (Xinhua) -- Zhu Guangya, who contributed to the development of China's first atom and hydrogen bombs, died Saturday at age 87.Zhu was a senior academician at the Chinese Academy of Sciences and the Chinese Academy of Engineering. He served as vice chairman of the National Committee of the Chinese People's Political Consultative Conference, China's top political advisory body, between 1994 and 2003.Born in central China's Yichang city, Zhu obtained a PhD in nuclear physics from the University of Michigan in 1950. That year he returned to China. He joined the Communist Party of China in 1956.

WASHINGTON, May 1 (Xinhua) -- The launch of U.S. space shuttle Endeavour on its final voyage will be no earlier than May 8, after technical problems uncovered last week proved more complex than originally thought, the U.S. National Aeronautics and Space Administration (NASA) announced Sunday.NASA tried to launch Endeavour on Friday on its 25th and final flight to deliver the 2-billion-dollar Alpha Magnetic Spectrometer (AMS) particle detector to the International Space Station. AMS, a particle physics detector, is designed to search for various types of unusual matter by measuring cosmic rays. Its experiments are designed to help researchers study the formation of the universe and search for evidence of dark matter, strange matter and antimatter.The space shuttle Endeavour sits on launch pad 39A as work continues on the shuttle's auxilliary power unit at the Kennedy Space Center in Cape Canaveral, Florida May 1, 2011.However, the launch was called off after engineers detected a failure in one of two heater circuits associated with Auxiliary Power Unit (APU) 1. Heaters are required to keep the APUs' hydrazine from freezing on orbit.NASA hoped Endeavour would lift off on Monday. But further trouble-shooting indicated the glitch was more complicated than officials hoped initially.The failure appears to be a power problem within the aft load control assembly-2, a box of switches controlling power feeds."That basically means the power is not getting out to the heaters that weren't working on launch day," said Space Shuttle Program Launch Integration Manager Mike Moses.

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