United States: their own spy satellite crashed.

<P> Technology report (tech.) news: NASA has released a summary of the secret report revealed that in April 2005 NASA launched a robotic spacecraft, the first DART, its original purpose is no human .involved in the case of the other satellites in orbit rendezvous, but unfortunately hit his own spy satellites. .</ P> <P> inaccurate navigation data, crashing home satellite </ P> <P> investigators found that led to the robot spacecraft aboard DART collided with the spy satellite because it is not accurate because the navigation data. .</ P> <P> said, the ship's computer system on the robot spacecraft that the spacecraft is away from the satellite, but in fact it is the speed of 1.7 meters per second near the satellite. .Investigators say, less precise distance and speed, resulting in the spacecraft did not ship the robot to take effective measures in advance to avoid a collision. .</ P> <P> In addition, the investigators also found that, DART spacecraft at the target satellite in the process, consume too much fuel. .Because the navigation data is not precise enough, leading to excessive consumption of motor fuels, residual fuel has been insufficient to support their tasks. .Investigators also raised the problems the task management model, DART spacecraft design team lacks training and practical experience, in the absence of expert guidance, misjudged the complexity of this task. .</ P> <P> robot collision of the spacecraft and spy satellites, the orbit of the target satellite up a bit. .NASA said the spacecraft and the satellite position is not a threat to the safety of other satellites, once they re-enter the atmosphere and burn collapse will not cause harm. .</ P> <P> all robot control, the future may explore Mars, the Moon </ P> <P> It is reported that all spacecraft systems operated by the robot, it will pave the way for space autopilot computer. .This new technology can be controlled in the absence of a state of complete spacecraft and other spacecraft and docking of dialogue, but also to help people return to the moon, Mars, or toward the deeper universe. .</ P> <P> DART is NASA robotic spacecraft's Marshall Space Flight Center under the control of manufacturing technology companies from the United States track and weighing about 400 kg. .DART spacecraft's mission is to meet the Pentagon, an orbiting satellite and maneuver around the satellite, close and then leave. .</ P> <P> currently rely mainly on the U.S. space program astronauts operating the space shuttle in orbit, or repair the spacecraft. .If this 24-hour mission spacecraft was successfully tested, the future use of similar technology in future manned and unmanned space project basis, for example, can make use of unmanned spacecraft to the ISS and other goods. .</ P> </ p>.

Giant meteorite found in Argentina.

Technology coverage (tech.) Message: Argentina astronomers and NASA scientists recently found in northern Argentina piece weighing about 10-14 tons of the giant meteorite. .Meteorite is a piece of Chaco in northern Argentina camp named the area found the sky. .Scientists estimate that about 4,000 years to 6,000 years ago, this area was a major meteor shower occurred. .Scientists previously had been discovered in this region a large number of meteorites, the largest piece weighing 33.4 tons. .Chaco region in the establishment of a meteorite national park. .New excavations in the No. 17 meteorite craters discovered. .This meteorite buried in the ground 7 m depth, while also unearthed more than 10 pieces from 80 to 300 kg of meteorites. .</ P>.

Small black hole high-speed jet mysterious planet.

<P Align=center> </ P> <P> Technology report (tech.) news: A new study shows that the central galaxy of small black holes can speed "jet" planets. .Prior to this, scientists believe that supermassive black hole can only speeding jet planet. .</ P> <P> researchers said, is actually smaller than the supermassive black hole jet black holes a larger number of planets. .In 1988, Los? Alamos National Laboratory physicist Jack --- Hills predicted that the Milky Way's supermassive black hole center can destroy the balance between the twin planets, planet bound, and high-speed jet will be on another planet .the Milky Way. .Since 2004, astronomers were found in nine supermassive black hole high-speed rejected by the planet, they speculate that the supermassive black hole mass of the sun 360 times. .However, Harvard - Smithsonian Center for Astrophysics Ryan O'Leary and Avi --- --- Liao Bo in the study shows that the central galactic black hole blasting a large number of small planets. .</ P> <P> the quality of these small black holes are only about 10 times the sun, some studies suggest that the central galaxy at least 25,000 small black holes around the supermassive black hole. .When some small black holes will be ejected planets galaxy, they will further close to the supermassive black hole. .Liao Bo said, "a small black hole than the supermassive black hole jet rejection rate of the planet faster! Study was jet trajectory and speed of the planet will help astronomers determine the number of black hole jet planets and how they exclude jet planet." .At the same time, they acknowledge that such research is not easy, the existing Space Telescope can not observe the Milky Way central supermassive black hole region, concentrated in the region, there are many small black holes. .</ P> <P> researchers speculate that the planet is large mass injection speed 709 km / s, they are gravitationally bound galaxy more slowly under the speed may be estimated when these planets are jet initial velocity of 1200 km / .seconds. .However, the planet is a small black hole jet speed to be faster, smaller planets in the exclusion of the black hole can reach 2,000 km under the / s speed from the Milky Way. .</ P> <P align=left> </ P> </ p>.

Giant black hole to destroy the whole process of the star (Figure).

<P Align=center> </ P> <P align=center> Imaginative: a star is torn by deep black hole where </ P> <P> Tuesday, U.S. scientists said they used the National Aeronautics and space .NASA discovered a giant radio telescope rotating black hole. .40 billion light years from Earth in a galaxy, the black hole showing a terrifying sight, a star is being trapped in a black hole tearing. .</ P> <P> the past two years, scientists have been monitoring this spectacular celestial phenomenon. .Into a black hole among the stars in the constellation Bootes, with the passage of time, the star is gradually being torn by a black hole gravity. .</ P> <P> scientists used the National Aeronautics and Space Administration of the universe Galaxy Evolution Explorer, or rotating radio telescope to detect two beams of UV light wavelength of light, then study found that UV light from a distant elliptical galaxy .The. .In an interview, the scientists found that the phenomenon described Geda Rui said: UV is emitted from the surface of a star, the star being swallowed by a giant black hole, tear. .</ P> <P> he explained: This is the first detailed probe into the radiation emitted by celestial phenomena such light. .Stars near the galactic center black hole swallowed by the phenomenon of 10,000 years is likely to emerge again. .</ P> <P> the core region of each galaxy, there will be a giant black hole. .Geda Rui said, for example, we live in Milky Way, the central area there is a huge dormant black hole. .</ P> <P> for the star constellation Bootes misfortune, the scientists said, the star away from its original orbit too close to the galactic center black hole, which was swallowed by the black hole's enormous gravity. .As the huge black hole gravitational pull, the star is extremely distorted, followed by the annexation of the black hole completely. .In the process, issued a flash of ultraviolet light, that is, our satellites detected the ultraviolet band. .</ P> </ p>.

Ï ¢ · é ¡ .° ÔÉÊ ¯ ¿ .Ó ¡ .± ÃæÉ''ý ½ Ò.

<P Align=center> </ P> <P align=center> ÉÏÍ ¼ × óÎ ª ÈýÎ ¬ ÎÀÐÇÓ ° ÏñÍ ¼ £ ¬ Í ¼ ÓÒÉÏÎ ª à «½ ¡ .È «½ ÌÊÚ ¸ ø ¼ ÇÕß ½ éÉÜÇé ¿ .ö £ ¬ Í ¼ ÓÒÏÂÎ ª ÍÅÔ ² É ½ μØà ² </ P> <P align=center> </ P> <P> ¹ óÖÝÊ ¡ .»¬ Ïè ° ® º ÃÕßÕÔÎÄÆÙÔÚÒ» 'Î »¬ Ïè · ÉÐÐÖÐ £ ¬ Å ¼ È» · ¢ ÏÖÏ ¢ · éÍÅÔ ² É ½ μÄ »· ÐÎ ½ á ¹ ¹ º ÜÆæÌØ £ ¬ º óÀ'ËûÔÚ ² éÕÒ ¸ ÷ ÖÖ × ÊÁÏ ² ¢ ÊμμØ ¿ .± ² ìÖ ® º ó »³ ÒÉ £ ¬ Õâ ¼« ÓÐ ¿ .ÉÄÜÊÇÒ »¸ öÔÉÊ ¯ ¿ .Ó ¡ .£ </ P> <P> </ p>.

Home Where to find the outer.

While so far almost nothing is still <P>, but scientists have never stopped the search for Earth-like planets. .No matter the outcome of their efforts, be sure that only actions have results. .</ P> <P> 2006 年 7 months, physicist Stephen Hawking in Yahoo's "Yahoo! Answers" column raised the question: "In a political, social and environmental chaos of the world are human in the next .A hundred years will be how to survive? "in all of the 25,489 answer, Hawking favorite answer came from a network called" Banfeng scientists "of the people. .He said: "With increasing threats to survival, human creativity is also enhanced. I believe that human beings are adaptable species, previously able to adapt to the future energy today ...... the same may not be re-used for a century .However, the widespread use of energy today, a century ago, it does not for human use, so we are likely to find other resources before the resources run out. </ P> <P>, of course, all accelerating the speed of evolution, humans may also .suffered the devastating Black Death as a disaster, but I believe that the disaster will be upon the prosperity of mankind, but also to survive, just as the sun will also rise tomorrow. "Hawking my answer is" I do not know the answer, this is .the reason I raise this issue. "But Hawking also said: face the threats may come, if human beings can find a way out into space, will be able to survive. .</ P> <P> Many researchers believe that the days of finding suitable for human survival is possible outside the home. .Discovered the first planet outside our solar system more than ten years, humans have discovered about 200 such planets. .In the next 10 years, NASA will look for Earth-like planets for launch, "Space Interferometry Mission" detector. .In the most likely to have Earth-like planets in the 120 stars, the scientists estimated that at least six stars with planets close to Earth's mass, 24 stars have a mass close to twice the planet Earth, as the quality of close to 3 times the planet Earth, should each .stars are. .</ P> <P> through the simulation of the formation of the solar system, planetary scientist at the University of Colorado Sean Raymond in September 2006 in "Science" magazine published an article that: around the Milky Way about 1 / .3 class solar system galaxies may have Earth-like planets exist. .</ P> <P> In addition, although we have yet to prove the existence of extraterrestrial found conclusive evidence of the emergence of life can not determine whether the result of an accident or necessity, but many signs are preferred the latter. .The basic components of life on Earth was twenty, including water several simple molecules, the scientists in the Milky Way are found in many parts of these molecules exist. .The latest tests showed that carbon dust on the planet fell particles can promote the formation of amino acids, many of these planets may be the basic components of life. .Some researchers have estimated the number of amino acids may account for the existence of the planet 10% of the total, and some even think that the actual number may be more. .</ P> <P> </ p>.

CAS confirmed that the naked eye can not see the Great Wall from space.

<P> What the naked eye in space can see the Great Wall of China? .This topic has long been concerned about the controversial. .Chinese Academy of Sciences recently completed a research team to study further confirmed: the naked eye can not see the Great Wall from space, only up to a certain spatial resolution satellite remote sensing images to get the Great Wall. .</ P> <P> by the CAS Institute of Opto Prachanda researchers and Jiang Xiaoguang Dai, Xiao-ring study's completion of the research published in the latest issue of "Technology Review" on. .They argue, human visual perception from the light, color vision progress to "shape perception," the emergence of a certain objective things to see, will observe the objects subject to size and distance. .The general inclination of the human eye pupil center is equivalent to a circle 1 / 3600. .</ P> <P> this basis, even in the case through as excellent condition, ordinary people can see the meter sized objects, the formation of flat "form sense," the limit distance of about thirty-six km, much lower than the general .hundred kilometers away to the public that as a starting point of the space height. .The Great Wall was basically two meters wide, in addition to pass a large tower, in general, the city station (beacon) is only five to six meters wide, it can be concluded that astronauts in space can the naked eye can not see the Great Wall .. .Three Chinese astronauts into space successfully confirmed that they did not see the Great Wall in space. .</ P> <P> the same time, most people can produce three-dimensional vision, feel the three-dimensional shape of the limit of observation of the object distance of about four hundred and fifty meters, beyond this distance will not lose the three-dimensional object recognition of three-dimensional form, can not distinguish between .objects near and far. .</ P> <P> researchers also noted that the use of remote sensing techniques will greatly extend the human visual function. .Chinese-American astronaut Chiao photographed from space, the Great Wall with a digital camera image, and the recent American Aerospace Museum's "space to see the Earth image," another example of validation of satellite remote sensing to carry out their test results the Great Wall, the spatial resolution .reached a certain degree of remote sensing images to display the Great Wall or other appropriate surface material, less than a certain level of resolution of remote sensors to the Great Wall will not be able to capture these objects were thin on the planet. .</ P> </ p>.