http://big5.xinhuanet.com/gate/big5/news.xinhuanet.com/photo/2010-10/15/c_12665063.htm Hubble Space

http://big5.xinhuanet.com/gate/big5/news.xinhuanet.com/photo/2010-10/15/c_12665063.htm Hubble Space Telescope January 2010 to May to shoot a group photo, michael northrop showing the after the asteroid collision scene. Photographs of celestial bodies that P/2010 A2. Two asteroids collided to form an X-shaped core of this strange object. Beijing October 15, according to the U.S. Space Network reported michael northrop that the Hubble Space Telescope photographed a group snapshot shows the scene after the asteroid collision in space, photographed this picture is the first time in history. In January, michael northrop scientists Lincoln Near Earth Asteroid Research sky survey program was first discovered in the asteroid belt is called a celestial P/2010 A2's. At that time, P/2010 A2 long tail, scientists believe it was a comet. But further observed that, P/2010 A2 is a more exotic objects. According to the Hubble Space Telescope photographs, this object has a bizarre X-shaped core. ESA Dutch astronomer, researcher Jessica Agarwal said: "I saw the Hubble photographs, you know it's a special thing fixed." University of California, Los Angeles astronomer in charge "Ha Researchers michael northrop Bo "observed David Jewitt said astronomers suspect that a larger diameter may reach 10-16 feet (approximately 3-5 meters) of rock crashed into a body of asteroid collision energy generated considerable At detonated michael northrop a small atomic bomb. Max Planck Institute for Solar System (Germany 卡特伦堡林 Road) planetary scientist, researcher Colin Snodgrass said: "This is the first time we observed the asteroid collided directly, rather than using a few million years ago, leaving wreckage speculate. "are smaller asteroids evaporate, peel off the material on a large asteroid. Followed by solar radiation pressure generated by the asteroid will hit the debris blown back, forming a tail like a comet. Hubble photo shows the celestial core diameter of 390 feet (about 120 meters), the tail of dust particle size between 1 to 2.5 mm, enough to form a Diameter 65 feet (20 meters) of ball. When asked why the emergence of a strange celestial X-shaped core, the Jewitt said: "Think about what will happen a brick thrown into the pool splashing water will not be smooth like a curtain, but a. series of jets, filaments and other structures, reflecting the shape of the brick and the impact angle, etc. In particular the body A2, or whether it is hit by the impactor may spherical, X-shaped arm may reflect the irregular shape, and a deviation from the center of percussion. michael northrop "researchers said, the formation of this celestial collision of two asteroids michael northrop may be more familiar, they most likely are two asteroids michael northrop larger size in a few million to tens of millions of years ago collide After the product. Jewitt pointed out that asteroid collision is more common, michael northrop moderate volume of asteroid collision occurred about once a year. He said: "The use of an asteroid collision camera facing great difficulty, because the big impact is rare, but like P/2010 A2 such a small impact and very dim blur." Two P/2010 A2 is formed by collision asteroids previously not known to scientists because they are very low brightness can not be observed. Scientists did not witness the crash, because michael northrop when two asteroids collided with the sun in the same direction. Computer models show that the collision occurred before or after February 2009. Jewitt said: "We thought would be a dramatic expansion of the debris field, like grenade shrapnel as it actually happened was the opposite situation we find this celestial expansion speed is very very slow ..." Research findings will be published in the October 14 "Nature" magazine michael northrop published on. These findings for the study of the behavior of asteroid collision debris during the performance michael northrop and impact of how the solar system formed dust throughout provides new clues. Jewitt said: "These observations are important because we need to know where the dust from the solar system and how much from the impact of an asteroid rather than 'outgassing' comets that we can apply these findings to other dusty debris disks around stars. research because dust debris michael northrop from the inner disk may be invisible celestial collision resulting Learn how to generate dust can get a clue about these invisible objects. "Astronomers plan to use in 2011," Hubble "on P/2010 A2 analyzed to determine the solar radiation back to blow the dust far and how the mysterious X-shaped core of evolution. Future telescopes will find plenty of similar asteroid impact. Jewitt michael northrop hope that the planned large-scale Synoptic Survey Telescope will soon be able to discover this phenomenon after the asteroid impact.
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