Looking at the sky during the day, what do we see? Finding answers to this question will give us a sense of different environmental conditions. If the cloud is covered with dense clouds, then nothing can be seen except the cloud. And if there is a cloudless sky, then will there be something very different? No Because, due to the effect of the bright sunlight, nothing will be seen. Of course, the flying bird or the aircraft will also be dropped. But in the evening when the evening will be, the dark wings are spreading to Basu, then a glimpse of cosmic wonders opens in front of our eyes. Clouds can be seen in the night sky, "dried bread", full moon moon, steady bright stars, or hundreds of stars to be met. Our planet's only natural satellite moon enhances the beauty of the night sky by its presence. It is also sometimes seen in the night sky and a special type of cosmic object. When we enjoy the beauty of the night sky with the naked eye, sometimes we can see some light moving objects around the globe, which are made from the long tail comet. This special flammable object, if the earth gets burnt before it falls on the surface, then we call it "meteor". That is, the meteorite is a small celestial body formed by stone or metal in the space of the atmosphere, which flows into the wind's climax when entering the Earth's atmosphere. And if the atmosphere does not get drained down, then fall on the ground, tell the meteorite. These two are meteoric (Figure 1). If we look at an easy algebraic equation, then
Meteoroid = meteor + meteorite
Figure 1. The meteorite fired meteorite and the fallen meteorite in the ground
Seeing this video will make the issue more straightforward.
Meteorite is a lot smaller in size than asteroids. When a meteor enters the atmosphere of the earth, its speed is about 20 km in seconds. Is. Most of the meteorite solar cells come from an elliptical asteroid in the Mars and Jupiter planets. In addition to this asteroid ball, Meteor can also be derived from the inner region of the solar system. And for this reason, there have been evidence that some meteorites found on the Earth's surface have been produced from the Moon or Mars. What happens when a non-Earth object enters the Earth's atmosphere? The object's temperature, temperature, material, mass etc. change. What else? The object collisions with atmospheric material and chemical reaction is performed. As a result, the internal temperature of the object increases so much that the meteor burns outwards. At that time, due to the aerodynamics heat, bright light was created and called it "Shooting Star". Some meteors are produced from the same source and dissolve in small portions of which the meteor rain (Figure 2)
Figure 2. They came down and meteor rain
Depending on meteor collection methods, they are divided into two categories. If it is visible at the time of meteor fall and then it is collected then it is called "FALL", and if it is collected in any other way, then it is called "FIND". Generally, tattoos are divided into three groups (figure 3). These are -
Stony Meteorites: These are mainly made of silicate minerals. Most tattoos are classified in this category. About 86% of the total meteorite available on the Earth's surface.
Iron meteorites: They are mainly made of iron-nickel metal. About 6% of the total meteorite found in the Earth's surface belongs to this group.
Stony-Iron meteorites: These are made up of a mixture of iron-nickel metal and silicate minerals. The remaining 8% belong to this group.
Figure 3. Various types of meteors
Continuous and advanced research on meteors divides them into more class and sub-categories of knowledge about their chemical composition and presence of mineral components. There is no time to discuss in detail in this article.
Immediately after most tattoos enter the atmosphere of the Earth, chunks break into pieces. From the research data, it is known that 18,000-84,000 meteors larger than 10 grams reach the Earth's surface, of which only 5 to 6 pieces reach only one year. Meteorite was found anywhere in the world, and according to the name is named. And if more than one meteor is found in the same place, then they are named after order. The size of the meteor can be different. Its diameter can range from several millimeters to several meters. When a large meteorite falls on the Earth's surface, then a big crystal is made on the earth's surface. Today, if we look back, we can see that in the past, there have been many incidents in connection with the earth's surface, with which the event of extinction of dinosaurs from the Earth is considered to be responsible in some way.
Although meteors can be found anywhere on the Earth's surface, FALL and FIND both types of meteors are limited to most regions of the Antarctic continent. And then from the area they are collected is the desert area. And very few things have been collected from other continents and other continents including the oceans and oceans. This does not mean that there is a large number of meteors in Antarctica or desert areas, but rather the geographic nature of both these areas is helpful for their discovery. Over 98% of Antarctica's surface is covered with snow and ice. The total area of ice-free area is only 2%, which includes hills, nunataks and oceans.