Kiss of Planets: Analysis of The Fatal Crash of Small Planets or Comets
Actually solar system that we live in is full of danger. This Year, People all Wear Cross body Bags 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. Really?! Mary-Kate Olsen Wear shoulder bags in Internship! Around about 65 million years ago, a huge asteroid impact caused the extinction of dinosaurs, in addition to birds, there seems no dinosaur's blood survived that. 12900 years ago, a collapse of the large-scale meteor shower caused by the comet's debris comes on top of the North American ice sheet.
The sudden disaster may directly lead to the extinction of mammoth and other large mammals and the disappearance of the ancient Indian Clovis civilization. The kiss of foreign heavenly bodies has always accompanied us, only different in scale. At 7:14 on the June 30, 1908, an asteroid or comet exploded over Siberia. Large scale of forest was pull radically down. The people of London could read the newspaper easily without the light in that evening. At October 9, 1992, a fire meteor with the luminance more than the full moon swept the sky and fell on one Chevrolet car. July, 1994, Shoemaker-Levy 9, which is lacerated by the gravity of Jupiter, crashed into Jupiter and leave big scars on the face of Jupiter. One of the biggest ones is big enough for the earth. September 2007, a meteor landed on countryside in Peru, leaving a hole of 4.5 meters deep, 13 meters wide. October, 2008, a asteroid, 2 to 5 meters in diameter exploded in the sky of Sudan after being discovered less than 20 hours.
Now, scientists have agreed that collision of a minor planet of about 1 kilometer in diameter can cause a worldwide disaster, and the chain reaction may even lead to the extinction of human beings, while what the scientists do not reach a consensus is the probablity of the collision of a minor planet of 1 kilometer with the earth. Some estimated that it happened once every 100 thousands while some think it is 500 thousands even 3 million. Although with great destructive power and can spread worldwide, according to all estimates, collision in such destructive power are extremely rare. Impact events similar to Tunguska are more common, it is estimated that the frequency of it is once every 1,000 years, of course, some people think it would be more frequent. The disaster caused by such scale of the impact is localized. It is equivalent to a large yield of atomic bombing, almost equal to 10 million tons TNT, or 500 Hiroshima atomic bombs. But even for smaller impact, the power can never be ignored.
Although effect of these collisions, no matter big or small, is chilling, they are currently the only natural disaster which can be avoided by existing technology at present. The source is the external asteroids or comets and we do not know the exact number of celestial bodies from 100 meters to several kilometers. By the end of August 5, 2009, human has found 6244 asteroids, among which the biggest one is in size of 32 km diameter However, there lies a very troublesome problem here, that is, some small celestial bodies near the earth can only be found when they are closest to the earth. The diameter of these celestial bodies is usually several hundred meters to a thousand meters, and they can destroy a city or cause serious ecological crisis, but we know only a small part of them at present. They are very dark and only can be found in the few days after flying over the Earth, because now their movement is apparent comparatively with stars' in the sky, once an asteroid is hitting the Earth in a few days, then how should we save ourselves?
In fact, now there can be very accurate prediction on when and where the impact of small bodies to hit. Take an example on October 7th, 2008 in Sudan, the crash prediction error of the location and time is only several kilometers and a few seconds. But if for some reason the exact information of the space and time is not released, then find a oil-saving car to drive north as far as you can because the places near ecliptic surface is more likely to be hit by asteroids. Of course, this is only a speculation based on reasoning. It is noteworthy that scattering family members and going to various different areas can maximize the chances of survive. At the same time never stay near the sea, as the tsunami caused by impact will sweep away everything.
Scientists are studying some ways to change the orbits. Although it seems unpractical to most scientists, but we know that development of technology will be far than our imagination. Even more important, in the duel with [heaven", we still have enough time at present. Although the consequence of the clash of small planets is very serious, it is an event of a small probability, at least it will not happen on the next day you read the article.



