Asteroid struck the Earth slim

Keywords: asteroid impact Earth

In the West, it was a taboo "13" this figure also taboo "Friday", "13" this day is just catching up with "Friday", is considered more unlucky, called "Black Friday". 2029 year 13 April is such a "Black Friday": as early as 4 years ago, NASA announced that on this day, the Earth is likely to be exposed to a numbered asteroid 2004 MN-4, human civilization will soon fade away.

Asteroid collision with Earth imagine figure

Scientists issue a staggering warning

At the end of 2004, NASA announced that the Earth was 2004 MN-4 asteroid of probability for three hundredths, criticality is unprecedented. 2004 MN-4 diameter up to 400 meters, is around the Sun orbits of a planet. However a few hours later, NASA scientists have the earth asteroid-third probability increases to 60, and at the end of the day, this probability has been identified as one of forty. Once aware of the impending significant risk, many people can only lament that life is too short.

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The impact of land, a diameter of 100 meters of the asteroid may have ten thousand people were killed, and if the impact to the ocean, the impact of the tsunami will be raised by 100 million people lost their lives. According to the scientists estimate that the current space 3000 size at least equivalent to the known asteroid 2004 MN-4 "near-Earth asteroids". In addition, the near-Earth orbit around also cruising with numerous equivalent bus size objects, such as the United States out of spy satellites USA193, to prevent it rammed earth, the United States spent missile to destroy the height. It is dealing with "killer asteroids" precedent? are we can launch a rocket into space to save the Earth from the catastrophe?

Ten years ago, the asteroid is dangerous in fact we do not know. The two discovered recently changed our perspective. The first is the 1990 scientists study confirmed that the asteroid Mexico velayutham card peninsula most likely triggered a dinosaur at 6500 years ago disappeared from the Earth's unprecedented disaster. A second discovery is the "Samui g-columns-9" Comet decomposition in 1994 hit Jupiter's spectacular screen. At the same time, the continuous improvement of astronomical observation means that we can see more of the activities of the asteroid, aware of their sometimes very close to rub shoulders with the Earth.

To create a panic atmosphere

At this point, many people may like such doubts, do we really live in the Batwing risk? asteroid is really just the innumerable may give one of human-induced disasters. A recent series of sensational stories frequently left the impression that life is about to end. Human threats – avian influenza, immigration, AIDS, rising sea levels or asteroid — properties may change, but the threat is always present, and the ever-present. The most boring thing in the panic, often let us stick to easy manner.

This trend is nothing new. Charles-Macon earliest in 1841 the extraordinary popular fantasy with grass Mania "lists the public on the magic, hypnosis and Tulip's followers, as well as from the flood to chemical drugs, etc. all biological extinction events of fear. Fresh from lies not in the public fear rumored hobby, or media of catty, flames, but in some institutions. Ten years ago, the world exists a wide variety of concerns, they have equally on the media for a variety of reactions. But the media's stroke is rather calm.

The circumstances are different. Today, politicians and Government officials looked more likely to increase our fears. In addition, there are many other voice very high interest groups — scientists, health safety officials, companies and their advertising agencies, non-governmental organizations and lobby groups. We never really know the true meaning of risk, we also have never been told that we as individuals to do to reduce these risks. So we must ask, from outer space in what was a real risk? most asteroids are considered to be a do not form a full planetary residue. Some small debris from the beginning to the Earth, but in Earth's atmosphere and burn a passionate, we see them as "shooting star" across the night sky. Not in the atmosphere of Meteor when you get to the ground becomes what we call the meteorite.

On Earth will suffer devastating damage conditions

If you want to life-threatening, asteroid heads must be large enough. Fortunately, the volume of a large number of asteroids in sharp decline, so while cruising count in the space of the asteroid, but these bus size objects only in the space in the ocean. In addition, the asteroid must have penetrated the atmosphere, the destruction of the Earth with sufficient energy. In other words, these asteroids must have three qualifications: volume, density, flight speed. Most importantly, the asteroid's orbit flight must be Earth orbit overlap.

But as Douglas-Adams in the Hitchhiker's Guide, a noted earlier, the vast expanses of space "," a volume relatively small tiny flying rock (Earth) flight itinerary, and a smaller rocks (asteroid) flight routes the possibility always overlap was minimal. In 1989, an asteroid in the six hours of difference and brushed past Earth, sounds very close, but if you know it from the Earth there are 43 million miles away, to understand how far apart the two — than the distance from the Earth to the Moon is far from. Finally, even if the asteroid to Earth, humans are not catastrophic. Only in extremely rare

, Volume huge asteroid hit the surface of the Earth, before the disastrous consequences for humans.

Asteroid 2004 MN-4 (now renamed to "Dreyfus Awa") of the volume ratio resulting in Asia-Arizona State Meteor Crater, geological and topographical variations of meteorites, but better than throwing 1908 Legenda big bang Meteor volume is much greater. Legenda big bang's destructive power equivalent to 1000 pieces of the Hiroshima atomic bomb's equivalent, the thousands of square kilometres of Siberian forests razed to the ground. However, when NASA scientists 2004 announced that Dreyfus Awa is heading to the Earth asteroids, it seems that they are not keen to show the world the warning of the dangers of this event. They were announced: "in many possibilities, as this asteroid has been the world's astronomers are tracking, possibility of impact will eventually be completely ruled out. "Their vigilance is the safe thing to do.

Make the right judgement is key

Scientists estimate that the orbit of the asteroid's future depends on its orbit around the moon. Because of the error and the computer observation model limitations, this route is not an accurate route, but rather a three-dimensional space. "Dreyfus Awa" asteroids, for example, it was found that the relevant part of this asteroid archive of photographic plate can be traced back to before the "find" it. On these data measurement quickly asteroid impact Earth's risk reduction to zero.

Also worth reminding that the subsequent further testing showed that the observation data exists, that means clear the alert signal seems inappropriate. Until two months later, scientists under Puerto Rico Arecibo radio telescope's latest observation data will impact of huge risk exclusion. However, we do not have to destroy the asteroids Dreyfus Awa. It orbits the Earth in 2036, its current orbit overlapping impact Earth's chance to wuqianfenzhiyi. Astronomer Patrick-Moore from this forecast, we can launch nuclear weapons, the flight track offset, so as to avoid the occurrence of a disaster.

However, the space launch nuclear weapons themselves at considerable risk. Some people take this kind of technology programmes to support people as a crazy person. United States Institute of Southwest Colorado Clarke-Chapman believes that greater danger does not come from real asteroids, but from various observation or forecast report, the error of judgment by severe panic. In the past, this kind of error warning to avoid, because scientists have been conceived to describe the "bad news" secret until they obtain proof of these "bad news" is not a news. In the future, this warning will be leaked out the possibility of greater and greater. However, in the face of the crisis should not be blindly panicked and, on the contrary, we must be clear on the face of the true risk to make their own judgement.