Deep Impact today staged a large space of three Aspect Unmasked (Photos).

<P Align=center> </ P> <P> comet Tempel 1 by scientists described as "iron-gray, cucumber shape, dirty mud ball, the size, such as Washington, DC" </ P> <P align=center> July .the 2nd NASA Jet Propulsion Laboratory under the researchers in the interpretation of "Deep Impact" details </ P> <P align=center> big impact moment described by the artist's imagination Figure </ P> <P> 7 月.4, NASA's "Deep Impact" probe with comet Tempel 1 comet in deep space staged the exciting drama of a close contact, this is the first human impact comet. .As planned, the impactor will "collide" 24 hours later, about 10 kilometers per second relative velocity bombardment of Tempel 1's nucleus, its power is equivalent to 4.5 tons of TNT high explosives, explosive power, in the nucleus .knocked the surface of a few tens of meters deep crater, at least there will be a house or a football field, the depth of 2 to 14 layers between floors. .Then, with scattered snow and dust, the scene is like a fireworks released in space. .</ P> <P> facts: Impact "shells" have been "collide" </ P> <P> NASA's Jet Propulsion Laboratory under 2 night said, "Deep Impact" probe launch successful as planned .the impactor. .If all goes well, to serve as "shells" of the impactor will be within 24 hours after the "hit" Comet Tempel 1. .</ P> <P> Pacific Time 23:07 (Beijing time at 2:07 p.m. on the 3rd) about "Deep Impact" probe to release the impactor. .Subsequently received signals that the ground, nearly 400 pounds, about the size of the impactor household refrigerators and detectors have been separated, is flying to the comet nucleus. .Jet Propulsion Laboratory engineer, said data checking that everything is planned. .</ P> <P> predetermined arrangement, the impactor will be Beijing at 13:52 on the 4th and the nucleus of the comet Tempel 1 collision, staged a "gun fight" comet drama. .The impact site about 130 million km from Earth. .</ P> <P> "Deep Impact" Spencer in charge of NASA space missions based in the city of Pasadena's Jet Propulsion Laboratory said that although astronomy enthusiasts look forward to a very high impact on the man-made, .But objectively speaking, this task extremely difficult, a bit like hitting a bullet with another bullet, so even if the impactor and comet pass, also normal. .</ P> <P> Spencer stressed that even if the impactor and the comet is not a direct collision, the significance of this test is not to be underestimated. .Now, whether it is the nearest flyby, shooting hit the mother ship, or at pieces of the impactor, conditions are good, "Deep Impact" spacecraft with comet Tempel 1 is fast approaching. .Before the collision, the impactor strengthen brass have three chances to adjust the flight path. .</ P> <P> fact, to this space impact, U.S. scientists have prepared several sets of alternatives. .They said that once the mother ship fired striker failed, then the program will use the emergency reserve, one of which hit the command module together with the mothership crashed into the comet. .However, it seems that alternative programs have been of no use, because the process of releasing the impactor is very smooth. .</ P> <P> script Keys </ P> <P> In accordance with the NASA official "script", are summarized as follows: </ P> <P> 1. Directed by: directed many big names together, gathered in the industry .leading institutions and scientific research institutions and enterprises, including NASA and the Jet Propulsion Laboratory, University of Maryland and other universities and the "Power" Space technology companies and other enterprises. .</ P> <P> 2. Scripts creative: 30 years ago, the British science fiction writer Arthur C. Clarke in a book called "2001" concept works out, "hit the comet," the creative, but also caused a lot of big-space .interest. .Through continuous improvement, and improve the plan after the final in July 1999 by NASA and other aspects of adoption. .</ P> <P> 3. Time: GMT at 5:52 on July 4 (Beijing time at 1:52 p.m. on the 4th.) .</ P> <P> 4. Location: 130 million km from Earth, deep space, the brightest star in Virgo, Spica nearby. .</ P> <P> 5. Lead one: "Deep Impact" Comet probe, on January 12 this year launched so far have been flying in space for nearly 430 million kilometers. .It consists of two parts, one vehicle, responsible for providing power and carries a lot of scientific instruments; the second is used to bombard the surface of the impactor nucleus, the volume is equivalent to an ordinary household refrigerator, weighing nearly 400 kg. .</ P> <P> 6. Hero II: Comet Tempel 1, which by the German astronomer Temple in 1867 and in his name that is named after the comet between Mars and Jupiter around the sun .elliptical orbit, the comet nucleus rotation period of about 42 hours. .</ P> <P> 7. Synopsis: Beijing at 14:07 on July 3, "Deep Impact" Comet impactor equipped with the mother ship from being released from the probe and begin to adjust flight attitude and speed, .waiting for an appointment with Tempel 1. .About 24 hours later, as the comet Tempel 1 about and to, both will be about 10 kilometers per second, the speed of "passion" collision. .</ P> <P> 8. Camera: The shooting large-scale, master of the elite to make out separate ways. .Space, the United States, "Hubble", "Spitzer", "Chandra" and Europe's "Newton" astronomical telescope observations from each band; the ground, the United States Kitt Hill Observatory, European Southern Observatory, also .will continue monitoring. .The condition of good visibility, the Western Hemisphere, people in some areas with high-powered telescope may also be involved in "Record." .</ P> <P> 9. Investment and Production: With 250 million U.S. dollars of investment, June 29 release of the Hollywood sci-fi blockbuster "War" more than "Titanic" 2 billion records to become the most expensive .videos. .And "Deep Impact" program is a total cost of $ 330,000,000, easily pick crown. ."World War" took 7 months taken together, and "Deep Impact" program since January 12 this year, launch probe began July 4 staged crash scene, about a month to return the first batch of data, go through .data analysis time of about a few months, until the entire project to be before March 2006 will end. .</ P> <P> 10. Film Mission: Violence not the purpose of this Part, a large spread. .Scientists believe that the material inside the comet nucleus composition and the surface may be significantly different, only the way to a similar impact within the in-depth study of the nucleus. .The impact of the scientific objectives include: first direct detection of the material inside the comet nucleus; understanding of the surface of the nucleus composition, density, strength and porosity; By comparison, the surface of the comet nucleus and its relationship within the material; understanding of comet evolution .history to answer the question what constitutes the nucleus and so on. .</ P> <P> Aspect One: the collision scene, 13.33 seconds, hit the live images of the most exciting </ P> <P> Some scientists believe that: "after the impact, definitely smoke filled the air, fires raging, until all the dissipation ., will what happens then? is knocked a football field and deep, or 4 football fields pit, or other results? "whether high-powered telescopes, or otherwise, is naturally observed .not see the extent of the impact is much in the end, but after the impact, generated by the brightness of the comet to observe, if the brightness, clear impact on the fierce, if the brightness is small, is clearly much more to light, or simply just like people think the comet .out differently. .</ P> <P> NASA also used the computer simulation of the crash scene, mainly the first 30 minutes and hit 30 minutes after impact the situation. .However, in practical impact, the detector can only take 13.33 seconds to live after impact. .Because after 13 seconds, the detector will automatically enter "safe mode", full of impact debris through the coma. .</ P> <P> able to faithfully record the scene in detail and the impact back to Earth is the two camera detector equipment. .Were these two high-resolution video camera imager (HRI) and the medium-resolution imager (MRI), they were different responsibilities. .MRI aperture which is 12 cm, viewing angle is 0.587 degrees resolution imaging of the nucleus surface is 10 meters. .In layman's terms, that is, the MRI is responsible for shooting the comet Tempel 1 the approximate external image. .Because the wide horizon, you can see the comet as a whole. .High-resolution imager (HRI) 30 cm aperture telescope, viewing angle is 0.118 degrees, imaging the surface of the nucleus of a resolution of 2 meters. .Perspective of the small, mainly used for observing the details of the comet impact. .This advanced equipment will be in the first two hours to return the nucleus was pushed to the ground, crater formation and jet curtain situation. .</ P> <P> It is reported that in the collision process, the impactor will also carry the camera toward the nucleus, the comet cores taken from the recent history of the image, the smallest 20 cm to distinguish details. .Impactor itself, cameras, ready to transfer up to three seconds before impact of the footage. .</ P> <P> Aspect two: one-shot deal, a collision like bullets bullets </ P> <P> the unprecedented impact can proceed smoothly, still faces some challenges. .Use the words of scientists, the impact is like "a bullet laden with another bullet, at the right time and place to hit the third bullet," and a "one-shot deal." .</ P> <P> serve as "shells" of the impactor probe will be in from a computer operating under fully autonomous flight, it must be able to accurately hit the target. ."Deep Impact" project manager Rick Grand Mill metaphor, which is like "the rapid movement to the needle threading." .Comet Tempel 1 to 30 kilometers per second, high-speed movement, and in front of its orbit "Deep Impact" probe the flight speed is about 20 kilometers per second, aircraft ejected from the impactor, "shells" must immediately adjust positions after ."escape" to avoid being hit or comet flying debris when the marked impact, affecting transmission to the ground and valuable scientific data. .</ P> <P> In addition, the implementation of "Deep Impact" mission scientist admitted, although prior to impactor release to hit all goes well, this does not guarantee ultimate success. .Until the impactor hit the comet, scientists at least three major challenges facing the other: </ P> <P> First, the impactor collided with comet indeed, the first two hours, the impactor will be changed to automatic navigation state, from the .carrying the computer and propulsion control of course. .As long as the computer software or propeller the slightest fault, then it may be not on the comet collision. .</ P> <P> Second, dust and gas around the comet likely to prevent the detector and the impactor data sensor related data back to Earth. .Once that happens, then the equivalent of "Zheng Yanxia." .</ P> <P> third, 15 minutes after the collision occurred, the probe will fly around the comet, scientists, facilities, particularly worried about the protection of the detector could not carry debris impact, the results of the detector were destroyed. .</ P> <P> Aspect Three: forever in space, look at giant impact have the names they are familiar with </ P> <P> the impactor hit the comet Tempel 1 the moment, while there are 625,000 people .The name will also join with the impactor, "pieces", turned into smoke in space forever. .</ P> <P> 2003, the Deep Impact spacecraft entered its final take-off stage. .In order to enhance the public's sense of participation, NASA education and public awareness program initiated a charge called "give you the name of the comet" activities. .Participants can log on NASA's website to sign up, and can get a government issued documents. .Detailed description of the proof of the name in the list of participants to the position. .</ P> <P> the signature campaign from May 2003 until 2004. .Although there are nearly a year for people to log on, but there are still many people waited until the last minute to log in sign site. .As to the activities that day, almost too many people log on to a system crash. .</ P> <P> after the end of the signature campaign, a total of 625,000 names of people being burned to a mini-CD disc. .At least some people on the list will be eager to look into the distance the sky, waiting for the impact of the spectacular scene. .Prairie Creek, Minnesota school seventh grade students also produced a special Deep Impact special projects. .Dee let their teacher gathered her students the same quality with the impact of the coin compartment, a total of about 50,000. .People throughout the town to help the children to collect coins throughout the end of the event, they collected 500 dollars worth of coins and the money donated to their sister school in Ukraine. .</ P> <P> If you log in "Deep Impact" website (deepimpact.jpl.nasa.gov), we could see tens of thousands of Chinese people has been submitted on his own name, these names and 62 million volunteers worldwide to submit .crashed into the comet with the information. .</ P> <P> comprehensive Xinhua news release </ P> <P> question one: "Deep Impact" will not change the comet orbit? .</ P> <P> 7 4, NASA's "Deep Impact" program will be 130 million kilometers from Earth at the implementation of the staged scene "to bombard a comet," the scene. .Experts in charge of the plan, the plan to destroy the possibility of very small comet, present and future Earth will not cause any danger. .</ P> <P> NASA scientists say they do not really know then when the weight of 372 kg of "copper head missile" and the comet Tempel 1 to 10.3 km per second, the speed of the collision what will be .consequences. .According to projections, the impact can produce the equivalent of 4.5 tons of explosives caused the massive explosion, and the comet hit the surface of a football field about 14 storeys deep pit. .</ P> <P> However, this impact can only speed the comet's own change of 0.0001 mm per second, appears to make its recent narrow point about 10 meters, the operating cycle less than 1 second. .In comparison, when the comet Tempel 1 in 2024, after Jupiter, by the gravitational influence, the recent change in point 34 million km. .In other words, a human "Deep Impact" project the impact of comets, and natural staged between the comet and Jupiter, "pass" scene than almost negligible. .</ P> <P> scientists noted that the impact is very unlikely to destroy the comet. .NASA's Jet Propulsion Laboratory, "Deep Impact" Tangyuemansi exploration program scientist, said: "From a scientific point of view, 'Deep Impact' program is like a mosquito to burst into a Boeing 767 passenger plane, will not .affect the orbit of the comet itself. "</ P> <P> question II: Behind the appearance of large collision has no military value? .</ P> <P> busy looking at large, apart from the collision, not a lot of military observers from the perspective of the task. .</ P> <P> military experts note that in this operation, NASA has repeatedly stressed two points: First, the U.S. space interceptor technology. .NASA Jet Propulsion Laboratory Aila Qi described the impact task of space exploration in a high-risk and daring experiment. .Laboratory scientists Gelai Mei said, basically, it is "fired a bullet at the exact time and accurate to click in another bullet," it is easy to think of this example, the U.S. national missile defense system; .Second, space remote control technology. .Detector and the distances between the Earth, requiring the directives issued by the ground must be absolutely accurate, can not have the slightest error. .According to the scientists calculated the impact when the detector is the distance from Earth to the average distance at 85%. .Day to the average distance that light in 8 minutes 19 seconds walk away. .That is, the distance detector and the earth, the light to go 7 minute, nearly 130 million kilometers. .Detectors so far from Earth, and is in motion, it hit the ground command issued, you have to play a lead and ensure that the signal to the time of the detector is also just to the predetermined position to receive instructions to start the program. .Conversely, because comets are in motion detectors and, if the calculation is not accurate, or have other errors, the impact is likely to hit the tank is not on the comet. .Therefore, once successful, then the remote control technology in the end the U.S. space can be high and to what degree. .</ P> <P> Sri Pu Qinke recent Russian military scholars have raised the sixth generation warfare theory. .This new theory has caused widespread concern in the international arena, the sixth generation warfare theory is based on the development of high-tech, and from 2007 to 2012 the sixth generation of the U.S. war technology maturing. .According to him pointed out that the scope of the sixth generation of the battlefield of war will be extended to </ P> <P> space, space will become an important battlefield war, space surveillance, space block, and direct delivery of space to attack from space, will allow space .become the sixth generation of the commanding heights of the war. .Therefore, a large collision can confirm that the United States from another perspective, have the potential of space warfare. .</ P> <P> three questions: What website to read live on the most convenient </ P> <P> So, how can ordinary people in the end to see the spectacle it? .Astronomers Weapon for people with enthusiasm. .</ P> <P> Obviously, ordinary people want their own "equipment" to see the collision of the "spectacular" is unlikely. .Fortunately, however, is that NASA has arranged a series of online live television, let the whole world for all to see the upcoming "shelling" comet feat. .Viewers can log in: </ P> <P> ● live to see the progress www.SPACE.com </ P> <P> ● View impact notice www.nasa.gov / multimedia / nasatv / MM_NTV_Breaking.html </ P> <P .> ● Tucson, Arizona's Kitt Peak National Observatory, Deep Impact in one hour before the start of the network will be broadcast live www.noao.edu/news/deep-impact/ </ P> <P> ● Pakistani Australia .Se Site astronomers will use the Charles Sturt University Remote Telescope observations of the impact event and live webcast beginning at sunset from the local observation and continued into the night black-hole-net.mit.csu.edu.au/telescope / .resources / deepimpact.asp </ P> <P> ● Mauna Kea in Hawaii's Peak, W · M · Keck Observatory telescope mount will be placed by a NASA Web site provides real-time picture astroday.net / DIH .-Tempel.html </ P> <P> ● Suoluo Na Mexico State, Carl Sagan Observatory will provide a Spanish radio network, and provide some of the characteristics of comets and the Deep Impact video cosmos.astro.uson.mx ./ Ciencia / Planetaria / di / live.htm </ P> <P> ● If your home then there is satellite TV, you can receive the European Space Agency's hit television live broadcast before the close-up and impact television.esa.int / default .. cfm </ P> <P> all of the above links are free and open to the public. .Another subscription service will also offer crash site Slooh.com real-time network news. .</ P> </ p>.