Actually solar system that we live in is full of danger. The Best UGG Boots Classic Tall for Gathering About 44 billion years ago, a celestial body in size of Mars came into collision with newly-formed earth and these fragments finally form moon. 650 million years ago, a huge asteroid hit earth, resulting to extinguish of dinosaur. It seems that beside birds, no animals having blood relationship with dinosaur survived. 12.9 thousands years ago, a large-scaled meteor shower caused by fragments of comet happened in ice field of north American.I’ll Have What Katherine Heigl Having: UGG Boots Classic Tall
The sudden disaster may directly lead to the extinction of the mammoth and other large mammals, and the disappearance of the ancient Indian Clovis civilization. Kiss of foreign objects and us had been always together; just the scales were in great diversity. At 7:14 am on June 30th, 1908, an asteroid or a comet exploded over Siberia. Large tracts of forests are radically pulled down; people in London that night can easily read the newspaper without lighting. On October 9th, 1992, a fire meteor brighter than the full moon crossed the sky and fell on a Chevrolet car. In July, 1994, the comet Shoemaker - Levy 9 which was torn into pieces by Jupiter gravity crashed into Jupiter directly, like a comet train. It left Jupiter many scars; one of them can hold the whole Earth. In September, 2007, with a loud bang, a meteor flew across the sky and fell on some place which was not far from a village in Peru, punched a 4.5 meter, 13 meter-wide pit. On October 7, 2008, a 2 to 5 meters in diameter asteroid exploded over Sudan in less than 20 hours after it was found.
Now scientists have reached consensus that the impact of the asteroids with 1 km in diameter can cause a global catastrophe, whose chain reactions may lead to human destruction. However, the scientists have not yet reached a consensus that how big exactly the rate that an asteroid with 1 km in diameter knocks with the Earth is. It is estimated that it may happen in every 100000 years, and still others say every 500000 years or even every three million years. Although the great destructive power can spread worldwide, but according to all estimates that the impacts are extremely rare. More generally is that the impact which is similar to the Tunguska event, it is estimated that the frequency of its occurrence is in every 1,000 years, of course, some people think that would be more frequent. The scale of the disaster caused by the impact is localized. like the explosion of atomic booms. It is like 1000 thousands tons of TNT or 500 atomic booms. However, even smaller crash is destructive.
Although these crash are chilling without the consideration of the size, they are the only technology can prevent the disaster form the sky at present. The source of the crash is the asteroids or comets. But we even haven`t known exactly how many object with the diameter between 100 meters to several kilometers in the solar system right now. Until August 5, 2009, we have known 6244 asteroids that near the Earth and the largest diameter are 32 kilometers. But here exists a rather troublesome problem; some small near-Earth objects can be found only when they are closest to the Earth. These objects are usually several hundred meters to 1 km in diameter, which can destroy a city or cause serious ecological crisis. But now we only know a small part of them. They are very weak, and only can be found when they fly near to the earth, because they will become obvious relative to the movement of stellar. So if there is an asteroid hitting the earth within a few days, then how should we save ourselves?
In fact, now it has been available to exactly predict the clash site and place of the small objects. Take the crash in Sudan on October 7, 2008, the prediction error of crash site and time was only several kilometers and a few seconds. However, accurate information about this collision place do not make for public for various reasons. So it is wise choice to drive on north after fill up your gasoline tank, since area of Ecliptic surface is more easily to suffer collision compared with other places. Because the asteroid's orbit within the solar system is basically in the vicinity of the ecliptic plane Of course, this is only a based guess. It is noteworthy that scatter family members to different areas will maximize the chance of survive. Never stay near the sea at the same time, the impact triggered by the tsunami will be swept away will sweep away all.
Scientists also are studying a variety of objects can be changed to track the way offenders, although most of the current point of view is still impractical, but technology developments are often far beyond our imagination. More importantly, in this "day" disaster of the duel, we currently have enough time. Although the consequences of impact of small objects is very serious, but that is an event with small probability, at least it will not happen to you after reading this article next day.