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Kiss of Planets , Analysis of The Fatal Crash of Small Planets or Comets
The solar system we live is actually a perilous place. The Subtlest Infrared Thermometer in Spring: 10 Shining Updated Products About 44 million years ago, a Mars-sized heavenly body crashed into the newly formed Earth, and the broken pieces formed the moon in the end. 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.How to Deck with Right Pulse Oximeter in For Summer Vacation
This suddenly disaster led to extinction of mammoth and other large mammal and disappear of ancient Indian Clovis civilization. 7:14 am June 30, 1908, a small asteroid or comet exploded over Siberia. Large tracts of forests were radially pulled down, and the people of London that night lighting could easily read newspaper without the aid of light that night. On October 9, 1992, a meteor brighter than the full moon flied across the sky and fell on one Chevrolet car. In July, 1994, the Shoemaker - Levy 9 comet which was shredded by Jupiter gravity directly crashed into Jupiter just like a comet train, resulting in leaving scares on Jupiter's "face", the larger of the scars could even admit the entire Earth. In September, 2007, a meteorite shot across the sky and fell not far away from a country in Peru with loud noise, forming a big hole of 4.5 meters deep and 13 meters long. In July, 2008, a minor planet of 2 to 5 meters in diameter exploded in the sky in Sudan less than 20 hours after discovered.10 Hottest Newest Products: Blood Pressure Monitor
Now scientists come to a conclusion that a hit caused by a asteroid with a diameter of 1000 meters can cause a worldwide disaster. The chain reaction of it can result the destruction of human. But what all scientists don't agree with each other is how likely a asteroid of a diameter of 1000 meters will hit the earth. Some estimate that it happens once in every 100,000 years, while some others think that it happens once in every 500,000 or even 3 million years. Although the destructive force is great and it is worldwidely affected, such collision is extremely rare according to evaluation. 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 the bombing of a large yield of the atomic bomb, almost equivalent to 10 million t TNT, or 500 Hiroshima atomic bombs. But even smaller impact, its power is not to be overlooked.
Although these are chilling impact no matter big or small, but they are currently the only existing technology that can be used to prevent the "day" disaster. The source of Impact is from the asteroid or comet, but we do not know exactly how many small planets which are between100 meters to several kilometers in size. Until August 5th, 2009, the known asteroids that near our Earth have reached 6244 of which the largest diameter are 32 km. But there is a very headache problem that some object near the Earth could only be found when it was very close to the Earth. The diameter of these objects is always between hundred meters to 1 km that can destroy a city or cause a serious ecological crisis. Now we just have known a part of it. They are all very dark that they could only be found in the few days when it flew near the Earth for they only became apparent while they were moving with the star. But if the object struck the Earth in these few days, what we can do?
In fact, place and time of the collision of small celestial bodies can be forecasted exactly today. Take the collision that happened in Sudan on October the 7th, 2008 as an example. The forecast of the place and time of that is only relatively several thousand meters and several seconds in error. However, if for various reasons the exact information of impact location is not released, then it is absolute first choice to look for a fuel-efficient car, fill it up and head north as far as possible. The reason is Ecliptic surface area is more vulnerable to impact from asteroids than other regions, because the orbit of asteroids within the solar system is basically near the vicinity of the ecliptic plane. Of course, this is only a reasonable guess. It is noteworthy that distribute family members to different directions will maximize the chances to survive. Meanwhile, do not stay near the sea since tsunami caused by collision can sweep everything.
Scientists are studying methods to change the track of celestial bodies which danger earth. Although most methods are far from reality, technical improvement is always out of our expectation. What is more important is that we have enough time in this fight with [natural disaster from sky". Although the impact of collision of small objects is extremely terrible, its probability is low and at least it will not happen after you reading this passage.
It is better to use natural environmental-protection materials when decorating the baby room, and to avoid the use of natural stones because they contain radiological hazards. Infant room of the ground is the best to select environmentally solid wood panel or environmental carpet, all these materials with natural environment, and has soft, warm characteristics, suitable for young children playing, learning to climb and so on. In decorating baby rooms, the walls should be decorated by the enviromental protecting fabric wallpapers which can be paint willingly on and easy to be cleaned. The lamps should be divided into different kinds according to their locations.
Dome light should be bright; wall lamp should be gentle; table lamp does not stab the eyes. You'd better use several little spot lights for dome lamp the angle of which could be adjusted when needed. This is good for the illumination and protecting the babies' eyes. Besides, decorating materials which have few manufacturing procedures are much preferable. According to the principles of "no pollution, easy to clean", you should also choose natural materials. The fewer manufacturing procedures there are, the better.
For example, some imported infant special wallpapers or high-quality wallpapers are all in line with this principle, which have less harmful substance and are easy to scrub. But even so, the just finished fitment, it still need to open doors and windows to ventilate for some time. Before the decoration, the parents should look for the department of detecting the air to do the ranking.
That is to let the environmental experts explain whether the materials and the craftwork designed in the project is bad for the microclimate of the baby room. Indoor microclimate includes the following aspects: temperature, humidity, relative humidity, wind speed, air pressure and so on. After finishing the baby room decoration, you must pay attention to ventilation. Baby room usually has narrow space, thus it requires regular ventilation. It can also be equipped with a ventilation device to keep the air fresh and to make polluted air timely be emitted, which is conducive to air circulation.
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