Information about meteorites, information about meteorites Profiles of meteorites

1. Meteorites are solid substances that fall from the interplanetary space of the universe to the earth. On a clear night, when the sky is full of stars, looking up at the night sky, you can sometimes see shooting stars dragging their shiny tails across the sky and disappearing into the sky. This meteor that falls to Earth, scientists call it a meteorite.

2. Meteorites are formed by some special reason, or planets, collapses, or cosmic dust that flies out, or fragments ...... from the collision of two planetsWhen they break into the Earth's atmosphere, they burn and melt due to high-speed flight and the friction of the atmosphere, and when they reach the surface of the Earth, they have become black, heavy stones, which are meteorites.

3. Meteorite, black, matte, the surface is not smooth, and it does not look beautiful. When members of the Antarctic expedition collect Antarctic stones as memorials, they generally do not pick up meteorites; For geochemists and cosmologists, however, it is a precious scientific sample.

4. The reason why meteorites are precious is that they are not easy to come by. Planetary debris from far away space, when it falls to the surface of the earth after a long journey, it is very easy to sink into the sea, and it is difficult to find a trace.

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Meteorites, also known as "meteorites", are unburned stone, iron, or a mixture of rocky and iron materials that are scattered on the surface of the Earth or other planets by cosmic meteors or dust fragments that have left their original orbits outside the Earth. Meteorites are made up of minerals such as iron, nickel, silicate, etc. It is an asteroid or comet that affects both the Earth's surface and life.

Meteorites can be roughly divided into three categories: stony meteorites, iron meteorites, and mixed meteorites of stone and iron.

Meteorites are called meteoroids before they enter the Earth's atmosphere, and due to friction, pressure, and the chemistry of the gases in the atmosphere, they cause their temperature to rise and emit light, thus forming meteors, including fireballs. Our planet receives 50,000 tons of these "gifts" every day, most of which burn up at an altitude of 10 to 40 kilometers above the ground, and are difficult to find even if they fall to the ground.

Because meteorites are from outer space, the determination of the authenticity of meteorites requires instrument identification, and the naked eye only has an auxiliary role. Most meteorites come from the asteroid belt between Mars and Jupiter, and a small number from the Moon and Mars. The average density of meteorites is between 3 and the main component is silicate.

The largest meteorite is the Goba meteorite, which weighs about 60 tons. The crown of Chinese meteorites is the "silver camel" found in Qinghe County, Xinjiang, weighing about 28 tons.

When meteorites fly at high altitudes, the surface temperature reaches several thousand degrees. At such high temperatures, the surface of the meteorite melts into liquid. Later, due to the blockage of the dense atmosphere in the lower layers, its speed became slower and slower, and the molten surface cooled down, forming a thin crust called "molten crust".

Molten crusts and air marks are the main features of the surface of meteorites. If you see a rock or iron with such a molten shell or air mark on its surface, you can immediately conclude that it is a meteorite.