What is meteorite?

What Does meteorite Mean

The meteorites are remnants of celestial bodies impacting on the Earth or any other star . These fragments reach the surface since, when passing through the atmosphere, they do not completely disintegrate.

It is important not to confuse between meteor and meteor . A meteor is an atmospheric phenomenon that can have different characteristics: the luminosity that the meteorite generates when it disintegrates is part of the meteors. But the meteorite itself is the solid element that falls from the sky .
You can distinguish between different kinds of meteorites. The stony meteorites or rocky consist mainly of silicate minerals and divided into Achondrites (who suffered fusion processes and distinguished from the asteroid or planet source) and chondrites (which were not recorded melting processes or differed from the body of which come from). The metallic meteorites , meanwhile, have iron and nickel as principal components. Finally we find the stony-metallic meteorites , with rocky materials and metals.

The term achondrites is feminine and is about igneous rock-like meteorites. Approximately 7.1 percent of those that reach our planet per year are of this type. The fusion and differentiation they undergo occurs due to a change in their temperature that forms magmas and brings the materials of greater density to the center of the body, leaving the others on the surface.
The use of the word achondrite dates from the late 19th century, and it was the Austrian mineralogist Maria Aristides Brezina who coined it to refer to rocky meteorites that did not have chondrules , spheres of a submillimeter size that are composed of various minerals and that in a chondrite are very common.
The chondrites , which can also be called chondrites , masculine, are at a considerably higher number than achondrites: over 85 percent of the meteorites that fall on Earth. The study of chondrites is essential to understand the origin and antiquity of the solar system, the existence of water on our planet, the origin of life and the synthesis of organic compounds.
With regard to metallic meteorites , other names they receive are holosiderites, siderites, ferrous meteorites and iron meteorites . In general, with their compounds they form alloys called taenite and kamacite . It is estimated that these meteorites come from the cores of asteroids that were destroyed after an impact.
Metallic meteorites are very large and dense: among all those that have been collected, the weight is more than 500 tons , almost 90 percent of the total mass of known meteorites. Note that, on the other hand, metals only represent 5.7 percent of those that fall on Earth.

Finally, there are the stony-metallic meteorites , which are also called lithocytes, mixed meteorites or siderolites . They differ from the previous ones because they have metals and silicate rocks in the same proportion. They are the rarest, since they represent 1.8 percent of those that fall on Earth.
In general, celestial bodies do not arrive as meteorites to Earth since they disintegrate when entering the atmosphere. Scientific calculations indicate that about a hundred meteorites fall on the planet each year, although a few are large enough to generate a crater when they hit the ground. That is why only some meteorites end up being detected and recovered.
The meteorite of greater weight and size that exists in the Earth is the Hoba fallen about 80 000 years in the territory that is now part of Namibia . It was discovered in 1920 and is estimated to weigh 66 tons.

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