What is a meteorite? Meteorites are called accurately? Meteor? It refers to the objects formed by cosmic meteors or dust fragments or unburned stones, iron or stone iron on the surface of other planets that leave the original orbit outside the earth, flying in the air at a speed 100 times faster than that of an airplane, and causing it to be as hot as a star in the process of rapid falling, so people also call it? Meteor? .
There are many kinds and shapes of meteorites. Scientists divide them into four categories according to the contents of iron and nickel: stone meteorites, iron meteorites, stone iron meteorites and glass meteorites.
Meteorites must have three main characteristics. The first is that there is a molten shell that has experienced high temperature; The second is that there are gas marks that have experienced high pressure; The third is the flow mark caused by high speed, which is the streamline. But some meteorites will be weathered and corroded by nature, and their appearance is very vague, but they must have some characteristics.
According to the data, the number of meteorites falling to the earth every year is very large, and it is conservatively estimated that 3,000 to 20,000 tons of meteorites fall to the earth every day.
Not all of them? Space rocks? Will fall to the earth, only about 1% can fall to the ground and become a meteorite. Most of them will be burned by friction when passing through the earth's atmosphere, so the meteorites we can find and recycle are very rare, and meteorites are also considered as very precious scientific resources.
Where can I pick up meteorites? The meteorites found so far mainly come from Antarctica and desert. According to the meteorite database of the Houston Space Center of NASA, 25% of the known meteorites come from desert areas, and the rest come from the surface of the Antarctic blue ice sheet.
Although the number of meteorites found in desert area is far less than that in Antarctic area, most precious meteorite samples are found in desert. For example, 80% of moon meteorites come from desert areas, and they also include Martian meteorites, carbonaceous chondrites, enstatite chondrites and K-group chondrites.
With the fiery meteorite market in recent years, meteorites have attracted wide attention from people from all walks of life. So are meteorites valuable? In fact, the economic value of meteorites mainly depends on its collection and research value, so the value of meteorites is different. Some meteorites will be more expensive, some will not be sold, or a stone. Meteorites with more witnesses may be more valuable.
At present, the most valuable meteorites in the world can be regarded as moon meteorites or Martian meteorites, but in the current market, there are no moon and Martian meteorites in circulation for the time being, because the number of them on the earth is too small, just like the Martian meteorite * * * is only 15.
The value of meteorites can't be seen only by their liquidity, just like meteorites are not only of unique significance to collectors, but also of great significance in scientific research.
Now meteorites have become a hot topic, and there are many antique collectors at home and abroad. In recent years, the domestic and international meteorite market has greatly increased in volume and prices have soared. Its value has far exceeded the price of gold in the past and can be compared with diamonds. Under normal circumstances, meteorite trading is accurate to grams.
The value of meteorites
1. Scientific research value, which is the most important embodiment of meteorites. Meteorites are samples of celestial bodies at all levels in the solar system, such as planets and dwarf planets. At present, in addition to the samples brought back by our human detectors, meteorites are extraterrestrial substances that humans can directly analyze and study in the laboratory. The cosmic information it embodies is one of the important evidences for human beings to understand outer space, which has irreplaceable scientific research value;
2. Collection value, worship and curiosity about meteorites have existed since ancient times, and now many works of art are decorated with meteorites. For example, the daggers found in Tutankhamun's mausoleum contain meteorites, and some extremely rare meteorites existed hundreds of millions or even billions of years ago. How small is the chance that they can fall to the earth and become meteorites and be discovered by us;
3. Spiritual value, people who play meteorites are playing personal hobbies, exploring unknown objects and exploring the universe.
Meteorites can be regarded as? Whispering? It is widely found that recycling meteorites is to promote the long-term development of astrochemistry and meteorites in China.