"Deep Impact" at 13:52 on the 4th official hit the comet (Photos).

<P> Deep Impact "bullets" loaded impactor released today, tomorrow 13:52 officially hit the comet </ P> <P> 天地大冲撞 </ P> <P align=center> Figure ①: Simulation of a comet after the impact, .eruption Fig. .</ P> <P align=center> Figure ②: "Deep Impact" impactor probe injection. .</ P> <P align=center> Figure ③: impactor acceleration. .</ P> <P align=center> Figure ④: impactor hit the comet. .</ P> <P align=center> Figure ⑤: a giant comet hit the pit. .</ P> <P align=center> Figure ⑥: detector near the close observation. .</ P> <P> NASA Jet Propulsion Laboratory, under the July 1, said plans in the Pacific time on July 3 night for the "Deep Impact" has entered the countdown stage, laboratory scientists and engineers have ."Crash" moment coming ready. .</ P> <P> today's final orbit adjustment </ P> <P> "Deep Impact" project chief scientist Michael. .Hearn said: "Deep Impact" Comet probe June 23, conducted an orbit adjustment, the positive --- it's the ultimate goal of rapid fly comet Tempel 1. .Now it away from the comet there are about 2.4 million kilometers, nearly 130 million km from Earth. .Project Manager Rick. .Grand Mill, said scientists and engineers involved in the project are "in good shape." .</ P> <P> according to plan, the detector will be the afternoon of July 2 last orbit adjustment, then we would release the impactor. .Expected impactor in Beijing 13:52 to the speed of 37,000 kilometers per hour, "H" on Tempel 1's nucleus, causing the surface of the ice nucleus, dust and other splashes, like the release in space .A big "fireworks." .</ P> <P> According to reports, later today, "Deep Impact" probe will orbit the comet Tempel 1 shot "bullets" in the next 22 hours, engineers on Earth will be manually .and the impactor probe manipulation. .Two hours before the collision, "Deep Impact" probe on the navigation system will start automatically, taking over the impact of the climax. .</ P> <P> Grand Mill, said: "It's like in the 'Deep Impact' in there as an astronaut, it will start its own thrusters to increase the initial speed of 3 times, and 'target'. After the injection impactor .hit the nucleus of the same hill. "</ P> <P> global" eyes "widened </ P> <P> The impact will be close attention to the scientific community. .Space, "Hubble" telescope, "Spitzer" telescope "Chandra" telescope, Europe's "Newton" astronomical telescope observations from each band. .Ground, the United States Mountain Observatory, Kitt, such as the European Southern Observatory will continue to monitor. .</ P> <P> But scientists say the naked eye can not see the more than 130 million kilometers from Earth, the big "fireworks" in the. .Only certain areas in the Western Hemisphere air visibility good circumstances, people can see through the high-powered telescope, "Deep Impact." .</ P> <P> detectors close the "voyeuristic" </ P> <P> January 12 this year launched "Deep Impact" probe has so far flown 400 million kilometers or more. .It consists of two parts: one aircraft, about the size of a hatchback car is actually a spaceship; the second is the external copper alloy reinforced by the impactor, weighing about 400 kg, nearly the size of a home refrigerator. .Near the nucleus of the comet Tempel 1, the impactor spacecraft will be ejected, and its nearly 8,000 kilometers in a safe location next to impact the process of observation. .</ P> <P> "Deep Impact" probe itself with two cameras, and an infrared spectrometer, an impact occurred, it will be close to the comet, and then "hide" the lower part of the comet at close range, while the .Earth return data. .</ P> <P> last month, "Deep Impact" probe has been through the coma of dust and dense gas, and found the location of the nucleus, which helps to hit success. .Through the detector, scientists have also observed the comet Tempel 1 had several brief "ice eruption phenomenon." .Many of the comet nucleus material occurs outside the phenomenon of ice jet, cause is still unknown. .Grand Mir said that the phenomenon will not affect the eruption of ice detectors and observations. .Deep Impact Schedule </ P> <P> event Earth receive time (U.S. Eastern) Continuous comet imaging 6 & 2 6 & 0 5 </ P> <P> optical image navigation to the first 9 minutes 6, 26 .& 0 5 2: 0 0 p. m. maneuver orbit correction 7, 2, 0 5 8: 0 7 p. m. </ P> <P> activate the impact battery 7, 2, 059: 57 .p. m. release impactor 7, 3, 0 5 2: 0 7 a. m. </ P> <P> from the impactor's first automatic measuring and recording speed up the release of 7, 3, 0 5 2: 1 .4 a. m flying fixed-point maneuver, the spacecraft turned to the implementation of 7, 3, 0 5 2: 1 9 a. m. </ P> <P> impactor came the first image 7, 3, 053: .5 2 a. m </ P> <P> motorized flying point, the spacecraft turned to the implementation of amendments (if necessary) </ P> <P> 7, 3, 0 5 3: 0 0 p. m. impactor's .automatic imaging system began imaging 7, 3, 0 5 1 1: 5 3 p. m. impactor targeting maneuver the first 7, 4, 0 5 1 2: 2 2 a. m. impactor targeting the second motor 7, .4, 0 5 1: 1 7 a. m. impactor targeting the third motor 7, 4, 0 5 1: 3 9 a. m </ P> <P> crash (error in three seconds) 7, 4, .0 5 1: 5 2 a. m. </ P> <P> spacecraft into conservation mode 7, 4, 0 5 2: 0 5 a. m. </ P> <P> closest point 7, 4, .0 5 2: 0 6 a. m. spaceship started imaging, continued 24 hours 7, 2, 0 5 2: 5 1 a. m. </ P> <P> Deep Impact Unknown suspense </ P> .<P> "Deep Impact" program will allow the first human to obtain from the comet nucleus material, which is the nearest human observed a "to sing contact." .The program began in 1999, a total cost of $ 300,000,000. .Focus has been the world's first artificial scientists astronomical events. .Why should humans in space "put fireworks", this reporter interviewed the domestic astronomer. .</ P> <P> to find the lost book of the Earth </ P> <P> Purple Mountain Observatory, Chinese Academy of Sciences researcher, Wang thought the 2nd interview that comets contain the most primitive solar system material, the impact in helping .the first man opened the secret within the comet, it would also help people uncover the origin of Earth and even the entire solar system and universe, the mystery of the origin of life. ."Shelling" the significance of the comet on this. .</ P> <P> scientists explain this is the image of the Earth: Earth is 46 million years old, it's like a book, 46-page book, the first few pages did not, why does not it? .We can see from the magma, the earliest of these things through geological processes, erase, so we most ancient rocks on Earth, it is about 40 billion years, the earliest found five or six million years, while the comet .to contain the most precious thing. .</ P> <P> explore and protect our future </ P> <P> "Deep Impact" was the comet after the impact, there will be some of the material inside the comet erupted, scientists will study these materials to understand the composition of the early solar system .. .</ P> <P> Shanghai Sheshan station science director Tang Haiming, we humans survive in the solar system, impact of comet assay is actually our living environment of human beings. .The solar system by studying the birth and evolution of the solar system can clearly understand what will happen in the future the changes will be made to what direction. .</ P> <P> Scientists say the survival of mankind in the universe, the need for more understanding of the universe. .The surface looks like everyone's life seems to be no relationship. .The long-term perspective, the impact of science and technology are areas of the comet, and scientific progress is driven by advances in productivity, is a systematic project progress, resulting Apollo program was a follow-up study, multilateral research on the subsequent economic .played a vital role in promoting. .</ P> <P> suspense, the comet has unknown </ P> <P> of cutting-edge scientists believe the impact will not be too much, too much suspense generated, everything is there an official in accordance with NASA .sequence program development. .</ P> <P> biggest suspense is to find the comet with a life, it would be a great achievement, Li Guangyu researchers say, this is the result of the scientists had expected. .Similar to that on Earth such as amino acids, these substances fall to Earth and life in protein synthesis. .</ P> <P> material impact origin to understand the Earth </ P> <P> along, there is a dispute in the scientific community, the material on the planet is likely to come from outside the reference space, but has not been .industry recognition. .</ P> <P> "near-Earth objects and the solar power research monitoring," researcher Li Guangyu, chief researcher at Purple Mountain Observatory, that such references that might be material on the Earth when the comet colliding with Earth to bring, because the comet .formation of the universe which is more original material, relatively far from the sun, the temperature is relatively low, for a long time around the sun once a star on the material to maintain the original state is not destroyed. .</ P> <P> oil is also a day of foreign objects? .</ P> <P> heavy material as the solar system began to sink, light began to distribute the material, which scientists determine the Sun's original material has long been gone. .</ P> <P> primitive when the universe was formed substances are present in far from the sun, comets and asteroids and other celestial bodies inside, and scientific research has confirmed the existence of organic material inside the comet, Li Guangyu researchers said that if this passed .impact confirmed, then there is a relationship with life. .</ P> <P> present the scientific community there is not a native of oil, but what celestial bodies to bring the outside world to say, but failed to enter the mainstream discussion of the scientific community was not generally recognized. .</ P> <P> Li Guangyu researchers believe that all the objects in the formation of the solar system experienced a violent early stages of the collision of small objects, do not rule out a lot of minerals on the earth is the result of "Friends" will bring possibilities. .</ P> <P> metal material properties of the asteroid belt are more comet lighter, more volatile substances, a large comet impact, then there may be the formation of mineral deposits such as oil, Li Guangyu researchers under such a conclusion. .</ P> <P> difficult comet hit the Earth? .</ P> <P> of scientists agreed that the probability of comet exists, but the probability is very, very low, low to normal people do not need to know and care about this issue. .</ P> <P> Tang Haiming, said Deep Impact comet this time not because of the destruction caused by the comet hit the Earth to the factors, and it is not practical exercises, is entirely a common scientific experiments. .</ P> <P>, of course, if the comet after the collision the Earth must be the case, through the substance of the comet after impact study before making a scientific decision after that to avoid disaster. .</ P> <P> scientists from the perspective of scientific analysis, "Deep Impact" was the reason not to death of the comet impact, which is dead material on the comet has a lot. .Comet material has been completely dead play, consume over, research has no real meaning to go, can not find organic material for scientific research and related scientific information. .</ P> <P> scientists say, will be successful regardless of the impact, the comet will not impact the results from the original orbit, the comet itself, the size of 6 km in diameter, the impact will not change its orbit. .</ P> <P> Although the impact is basically the comet's orbit will not change, but the impact of a variety of scientific data, will prevent future comet or asteroid colliding with Earth and the human self-help measures to be taken to provide valuable .information. .</ P> <P> impact are N possibilities </ P> <P> the results did not come out before the crash, all budgets and expectations can only be "on paper." .</ P> <P> analysis that our scientists, from a technical point of view, NASA plans in the work, all parties to do the very tight space by NASA in the past record of success, this is no problem with the comet impact .. .</ P> <P> able to fulfill the expectations </ P> <P> "Deep Impact" was like a missile launch, as amended in constant orbit, to ensure that the impactor at the last minute to hit the comet. .However, the results of the impact, cutting-edge scientists are most inclined to "can impact, but can not complete the target." .</ P> <P> "impact on the probability is quite large, but does not rule out the possibility of grazing, but after the comet itself, dust filled the air, that impact can not find the nucleus," including the king thought, Tang Haiming, and .Purple Mountain Observatory, Li Guangyu, including experts such evaluation, the results also hit extremely hard not rule out the nucleus, the impactor hit up no response. .Nucleus is precisely what scientists need to understand the material, and is based on the United States have the impact NASA projects. .</ P> <P> "The key is we really do not understand the nucleus." .</ P> <P> debris can not fly to the earth </ P> <P> scientists believe that comets are the result of crushing impact impactor completely impossible. .</ P> <P> "Basically, this possibility does not exist, because the impactor, it is too small for the comet, the size of Boeing aircraft hit like mosquitoes, the probability is too small," Wang thought Fellow .said another reason is that the impact strength of the impactor is not enough, the biggest eruption is some material on it. .</ P> <P> crash occurred when comet Tempel One Earth 132 million kilometers far away, or the fragments of comet hit the Earth can not. .</ P> <P> Previously, NASA official website said that the impact is equivalent to 4.5 tons of TNT high explosives, explosive power, knocked at the surface of the nucleus of a few tens of meters deep, circular pit football field. .The collision will lead to a large number of the nucleus material out of the space jet, so that the brightness of the comet increased significantly. .</ P> <P> this prediction, scientists have still been doubts, because the situation of human beings do not know the comet itself. .</ P> <P> course, as scientists, we still hope that the deeper the impact knocked the best better, for later detection of comets within the material to better carry out all aspects of scientific research, Li Guangyu researchers said. .</ P> <P> impactor first contact </ P> <P> "Deep Impact" is a NASA solar system exploration "discovered" a project plan. .One envisioned through the impact of the comet nucleus Temple, exposed its internal matter for research. .In their view, the nucleus contains material left over from the solar system birth. .</ P> <P> 2004, the one called "cluster" of the detector has been through a comet's tail, a collection of some of the dust material, but the specific data until next year back to Earth. .</ P> <P> a European Space Agency called "Rosetta," the probe will be landing in 2014 the nucleus of a comet, the comet carrying the instrument will analyze the material composition. .Although the plan was high hopes, but as a result of the time is still far away, "Deep Impact" program has become so far, the human and the comet's first "intimate contact." .</ P> <P> Chile will be the "Deep Impact," the best observation point </ P> <P> Recently, Chile has become astronomical observations, and the fans to focus on. .Because of the Andes in Chile will be observing the comet, "Deep Impact" the best place. .</ P> <P> French astronomer Orinoco text. .Mark told Reuters, "about Germany, the United States, France, Spain, Belgium and the Netherlands 10 of the solar system comet experts have recently arrived in Chile." </ P> <P> "Chile is the most .good observation sites. We have the world's best telescopes, and the concern of the impact from start to finish. "Marco is a member of Southern European Observatory, in Chile, his overall responsibility for observation. .The observatory consists of 11 member countries. .</ P> </ p>.