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>.

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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>.

Many planets in the universe may have two suns.

<P Align=center> </ P> <P align=center> Legend: Movie "Star Wars" planet with two suns by Tuta </ P> <P align=center> </ P> <P .align = center> Legend: the universe may be, there are many that can see both the sun hanging in the sky in the planet </ P> - Technology report [tech.] news: According to NASA's website recently reported that the U.S. .NASA's Spitzer Space Telescope found planets orbiting around the double-star system is the common property of these planetary systems may include the composition of the dust disk composed of asteroids, comets may also contain planets. .<P Align=left> fact, more than half of the known universe, galaxies are binary systems, that is the universe there are many planets with two suns, this situation as "Star Wars" in the tower because of the planet .the two suns in the sky, like the scene. .</ P>.

Weight is equivalent to the largest planet Earth 2500.

<P Align=center> </ P> <P align=left> one and the same size as the planet Jupiter is the planet through its revolution. .Now, scientists discovered a planet 15 times gravity, 8 times the mass of Jupiter exoplanets. .</ P> <P align=left> Astronomers recently discovered a solar system is currently the largest planet found outside the planet's temperature of 1,000 to between 2000 ° C, 15 times Earth's gravity, it .year, equivalent to only about 5.6 days on our planet. .Fengyun peculiar gas planet is named HAT-P-2b, is located 440 light years away from us on the constellation Hercules (constellation Hercules). .</ P> <P align=center> </ P> <P align=center> Hercules constellation </ P> <P align=left> Harvard - Smithsonian Center for Astrophysics astronomers use telescopes HATNet global auto .network system that has a huge density of the unruly planet. .The network system can automatically scan the night sky every night to find extrasolar planets. .HAT-P-2b is the second pieces of the system found in extrasolar planets. .</ P> <P align=left> Center for Astrophysics astronomer Gáspár Bakos said: "The planet is so unusual from the beginning we thought it was a false alarm, because a lot of the planet appears to be the last planet discovered .is not. "He led the team in the" Astrophysics "magazine published the findings. .</ P> <P align=left> team can turn it by the public to observe the planet to determine when it is something about its characteristics. .Bakos said: "We estimate that it is a great attraction is about 15 times the Earth." This means a 68 kg weight on the earth who, to the HAT-P-2b weight on the planet can reach 950 kg. .</ P> <P align=left> scientists believe the planet's density is very large, although the HAT-P-2b smaller than the planet Jupiter in our solar system's largest not much, but it is important than the Jupiter 8 .times the mass of the Earth is equivalent to 2500. .</ P> <P align=left> HAT-P-2b the distance around the star from its close, only 500 million km journey around only 1,500 kilometers, so it is the time required for one revolution on the planet as long as the equivalent of .5.6 days. .</ P> <P align=left> why this strange phenomenon, scientists believe there is a possibility that it may be still hidden around another planet. .</ P> <P align=left> Bakos said: "may HAT-P-2b, there are still around we have not found a planet interacting with it." </ P> <P align=left> Research .say, calculated over the conclusion that the density of strange planets should be able to exist, and this new discovery just to provide conclusive evidence. .</ P> </ p>.

Astronomers announced Altair "Photo Album".

<P Align=center> </ P> <P align=center> Altair (also known as Altair) simulation map, high-speed rotation so that the shape distortion occurred. .(Photo from: NSF) </ P> <P align=center> </ P> <P align=center> Altair and Vega Star Chart </ P> World Scientific reports [tech.] News: across the Milky Way .Looking to the Altair Vega, the true face look like? .Astronomers recently published a photo Altair, which is by far the most detailed pictures of extrasolar stellar surface. .<P Align=left> According to the U.S. "Science" magazine website recently reported that an international team of astronomers selected 17 light years away in the Altair as the research object, it tried to take a good photo. .Although the picture clarity and people usually used to see a close-up surface of the Sun can not compared, but the study of stellar evolution and even the search for extrasolar planets, this is already a major breakthrough. .</ P> <P align=left> distance too far because, in addition to the Sun than the stars observed in the previous image is often only a vague spot. .The California scientists used high-resolution telescope Wilson array of mountains, on the Altair observations. .</ P> <P align=left> the observed image display, a rotating star is Altair, the shape is quite flat, a bit like a pumpkin. .Large equatorial bulge with darker areas. .The bulge region is not related to existing models, and its formation may be related with the rotation of Altair. .Analysis revealed that Altair rotates very fast, has reached the limit it can withstand the speed of 90%. .If the rotation speed limit, it will fall apart. .</ P> <P align=left> scientists speculate that high-speed rotation in stars may be common, as many stars as the Altair to the lack of a strong magnetic field to the rotation of "brake." .Solar rotation is very slow, and may be a special case. .</ P> <P align=left> photos more telling than the spectral data will help scientists carry out direct analysis of the status of the star. .The team plans to use the same method to observe the binary system, and hope that eventually could take more pictures of extrasolar planets. .</ P> </ p>.

Methane mystery of Mars and Titan fog triggered speculation of life 6.

World Scientific reports [tech.] News: According to "when the e-News" reported that the new issue of "Scientific American" published an article on the space life exists on Mars and the "Titan," the possibility is analyzed. .Article are summarized as follows: <P> Of all the planets in the solar system, in addition to Earth, the Mars can be recognized as the most potential for the birth of life, life may exist now, it could be used to have life. .Mars and Earth have many similar features, such as: the formation of the early history of climate, water storage, and volcanoes and other geological activities, these may be just what microbes need. .</ P> <P> while the other has often been included in the discussion, that there may be alien life exists, it is Saturn's largest moon - Titan (Titan, or "Titan"). .Titan generated just once conducive environment for the formation of life precursor molecules, some scientists believe there was life on Titan, or even the existence of life now Jiuzheng. .</ P> <P> to make these more interesting possibility is that these two celestial bodies when the astronomers have detected an often accompanied by the appearance of life, and life is closely related to the gas - methane. .Amount of methane on Mars though not many, but very significant; the Titan methane is almost covered. .</ P> <P> the possibility of methane from the bio, as much as possible from the geological activity, even in the Titan is not, at least on Mars is so. .These two possibilities explain the different ways the emergence of methane, and are quite reasonable, which shows that we in the universe may be not so lonely, or is under the ground of Mars and Titan, have a lot of liquid water, and with .Geochemistry of the unexpected events. .If you can understand the source of these objects and the fate of methane, will be crucial clues to enable us to better understand the solar system and even those outside the solar system objects like the Earth, including the shaping process of evolution and the possibility of life .. .</ P> <P> Jupiter, Saturn, Uranus and Neptune, the giant planets, the high content of methane, which is the original solar nebula after by the chemical reaction product. .However, in the Earth's atmosphere, methane is in a special gas, content of only 1750ppbv (1ppbv that the volume ratio of one in 1.0 billion), of which 90 to 95% from bio. .Herbivorous hoofed animals such as cattle, sheep and yaks, etc., methane emissions from the annual global methane emissions account for 1 / 5; these gases from the intestines where they are after the metabolic products of bacterial action. .Other important sources include termites, rice paddies, swamps and natural gas (natural gas is formed by ancient life), as well as the equatorial rain forest plants also release methane (see the March 2007 number <plants, methane and global warming> ..) .</ P> <P> on Earth, volcanism of the total methane produced by less than 0.2%, and discharged through volcanism, and possibly methane produced by ancient organisms. .In contrast, the role of methane from non-life, for example, generated by industrial processes, it is not so important. .Therefore, once the other similar objects on the Earth to detect methane, natural objects have also enhanced the possibility of life. .</ P>.

Students are not free in the universe, but a "past life".

<P Align=center> </ P> <P align=center> spatial scale in the universe rebounded in the schematic diagram </ P> <P align=center> </ P> <P align=center> the universe through the precision of human .telescope when the universe was born scene </ P> World Scientific reports [tech.] news: a theoretical physicist, said the United States, according to his establishment of a new mathematical model of time and space, our universe is not born out of nothing, it .a "past life." .<P Align=left> Under the existing theory, scientists generally believed that the birth of the universe is 13.7 billion years ago, this is known as the Big Bang event is the starting point of everything, including time and space. .But the United States theoretical physicist at Pennsylvania State University 马丁波乔瓦 Stewart in the new issue of "Nature Physics" published a paper that the big bang is not the time to start..波乔瓦尔德 said, models show that the moment the big bang, our universe is very small but not small enough to zero. .</ P> <P align=left> model also shows the big bang the universe is likely to be the demise of the previous triggered. .And the accelerating expansion of the universe we are different, before the start of the Big Bang, the universe of "past life" a contraction. .According to calculations, the gravitational energy savings is very large, the universe to a certain degree of shrinkage will occur after the "big bounce", just as the ball hit the ground heavily after the will bounce back..波乔瓦尔德 that the "big bounce" triggered the current expansion of the universe, in our universe, there are likely to find their "past life" left behind. .</ P> <P align=left> this model means that the big bang is not the time, the universe may have infinite past and future. .</ P> <P align=left> but some experts believe that 波乔瓦尔德 of this hypothesis remains untested. .</ P> </ p>.

Total lunar eclipse when the moon is dark red Why?.

<P> World Scientific reports [tech.] News: the night of 28, total eclipse, such as about coming out the sky, some enjoy the total lunar eclipse, when the public will find that the moon becomes dark red. .Why, when the total lunar eclipse, the moon will turn dark red? .</ P> <P> this dark red light, is the exposure to the lunar surface to the sun. .Tianjin, Zhao Heng, director of Astronomical Society, said in a layer around the Earth like a gauze-like transparency, good atmosphere, the sun's atmosphere from the Earth side of the walk through time, are first space into the atmosphere, and then, but also from the atmosphere into space, .This resulted in two refraction, similar to the results and the light through the convex lens, a little inward, to the center of the earth to the direction of deflection of the polymer light of the moon shine. .</ P> <P> why the total lunar eclipse, when exposure to the moon the sun, will be dark red? .</ P> <P> Zhao Heng further explained that the sun light is red, orange, yellow, green, blue, indigo and purple colors mixed into the light. .When sunlight through the Earth's atmosphere is refracted into the shadow of the Earth to go behind the time, they are extremely small by the atmosphere scattering and absorption of air molecules. .Like yellow, green, blue, indigo, violet and other colors of light is short, the scattering in the atmosphere are relatively large, most of them are scattered in all directions out; relatively long wavelength of red light by scattering is not .can penetrate through the atmosphere out refracted to hide behind the shadow of the moon on the Earth. .So, in total eclipse, the public can see the moon is dark red, the so-called "Red Moon." .Sudden drop in the Shanghai and Shenzhen stock market how to deal with individual investors? .Students start: Beautiful Feet out of the way to get rich secrets of brand building?? Ringtones to food of poor students from Tsinghua, charter provoke bother anyone? .Posts the deposit to good HR managers to lose their flavor Ten Characteristics of good Granny pumping 170,000 UK cigarette live for 100 years Maytag mixed Galmer Arbitra house the world's most toxic food list how to sell a good price? .Business intelligence market, the development trend of the three latest "Happy 131" well-being of the restaurant owner disadvantaged women brand 4F survival of ancient eunuch Inside the "castration" Dharma scientists can not explain the supernatural phenomena (Photo) Olympic marketing ranking Chinese and foreign brands .List of South African companies, said the world's largest diamond found the eight elements of good car maintenance homemade gourmet heart-shaped pineapple Olympics, short rental market is subject to favorable risk-prevention </ P> </ p>.

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Chang'e-1 Lunar Eclipse in "dark" of the Lantern Festival

Keywords: Chang'e-1 Lunar Eclipse Lantern

This year, the Lantern Festival encounter "black." "Fortunately" total eclipse of the field in tomorrow during the day, the country has almost no observation, only appears in Europe, America, Africa and other continents. But when the moon to the Earth block the Sun's "back", relying on solar-powered Chang'e-1 lunar satellite will temporarily lose part of energy. To this end, the Beijing Aerospace flight control center is ahead of the implementation of satellite orbit adjustments, on-board key equipment are ready to prepare the "dark". Total eclipse of the Moon: confronts broken test to crisis

Chang'e 1, usually at the height of the Moon's 200 km circular orbit around the Moon, but on the day of the Festival, the whole moon and satellites see smooth, are obscured by the shadow of the Earth's huge, it is expected that the time is three to four hours. It was revealed that this transfer orbit, the satellite orbit is elevation near 2 km, means "Chang" in Eclipse shadows of time will be shortened to two hours, almost around, around the time required. This is not only a satellite saves a tremendous amount of fuel, the satellite's solar array wings to gather energy, can also be hidden in the battery, the protection of short-time electricity.

Eclipse of the period, the Sung part of carrying on a scientific survey instrument will temporarily shut down, particularly in some consuming a large instrument, but experts believe that total eclipse in General, the work on the satellite. Referred to as the "Lunar laser eye" of Chang'e-1 laser altimeter was also in the ranks of the "power-saving shutdown", the development of the Chinese Academy of Shanghai Institute of technical physics, introduction, laser altimeter by power-heating, working temperature-20 ° c, but in the power of the vacuum in the temperature drops dramatically until about 20 degrees Celsius below zero, which parts of the instrument have a certain influence. But researchers indicated that the ground-temperature measurement is considering Eclipse, and set more stringent conditions, equipment such as optical deformation within the manageable. World Science report (tech.)

Chang'e 1 this summer will also have to undergo an Eclipse, and also to reduce rail ahead of schedule. In addition, the country's next total eclipse of the Moon is visible, to wait until June 2011.

Scientists have confirmed that dark energy is the greatest force expansion of the universe.

<P> Keywords: Scientists dark energy expansion of the universe </ P> <P> from Johns Hopkins University astronomer 艾达姆里斯 (sound, Adam Riess) and his collaborators through the Hubble data .the outbreak of the ancient study of stars found in the past 90 million years time, the expansion of the universe dark energy is the greatest force. .They also found that about dark energy and cosmological constant. .</ P> <P> 1998, when the Hubble telescope and other astronomical data coming from the accelerating expansion of the universe is being shaken by the news of the entire astronomical community. .Prior to this, cosmologists have long known that the universe is expanding, but they believe that the universe's expansion rate under the effect of gravity will continue to become smaller. .The accelerating expansion of the universe that astronomers are puzzled, since physicists are still looking for a reasonable explanation on this issue. .</ P> <P> understanding of the universe - the universe is expanding </ P> <P> on the author by the accelerated expansion of the universe cosmology prize </ P> <P> astronomers said, the reasons for the accelerating expansion of the universe is .may be due to "dark energy" exists, they consider the role of dark energy to offset the gravitational acceleration of promoting the expansion of the universe. .To appear such an effect, dark energy must account for 70% of the total energy of the universe or even more, but so far has not found direct evidence of the existence of dark energy, but scientists can not determine its nature is a stable constant or a time .variables. .</ P> <P> off-day dark energy involved in the "cosmological constant" was first proposed by Albert Einstein, which raises the inference is that regardless of expansion or not, the cosmic vacuum energy density is everywhere equal. .That is, when 1 cubic centimeter to 10 cubic centimeters of space expansion, will in some way ten times more energy. .World Scientific reports </ P> <P> this is now by the Hubble have more understanding of the mysterious energy, Reese and colleagues studied the use of 24 types of telescope-1a supernova emitted light. .This supernova astronomers as the brightness is usually standard, as they have the same brightness, and thus astronomers can guess when they are after the outbreak of the outbreak and how the universe is expanding. .</ P> <P> observation report shows that about 90 million years ago, dark energy began to work, at first less influential, but the data is displayed in six billion years ago, when dark energy and gravity in "cosmic tug of war ."the upper hand, the universe began to accelerate expansion. .Observation report confirms that the cosmological constant is still the best explanation of dark energy, is more reasonable than other theories. .</ P> <P> Einstein in 1917 leads to "cosmological constant" concept is to make his general theory of relativity and the universe is not expanding at the same point of view. .1929, American astronomer Edwin Hubble discovered the expanding universe, Einstein considered the cosmological constant in his life made the "biggest mistake", but the fun is the Hubble Space Telescope, named after the data has been .the cosmological constant was reborn. .World Scientific reports </ P> </ p>.