Why can meteorites burn without oxygen in space?

If there is no oxygen in space, why can meteorites burn?

There is no friction in space and there is a vacuum, so why do we sometimes find that the meteorite is in a burning state when we observe it?

Meteorites emit light because of high temperatures, not from combustion. Something that glows doesn't necessarily burn, like your light bulb, which glows, but never burns.

The essence of meteorite luminescence is high temperature. Any substance, as long as the temperature is greater than absolute zero, will constantly radiate electromagnetic waves outward. Some are strong, some are weak, and their power is proportional to the surface area and also to the fourth power of temperature.

We usually see red-hot iron blocks, which glow because of high temperatures, which radiate electromagnetic waves outward. And the visible band in it is strong enough for us to be able to see.

The same principle is the same for the flames we see, which are mainly radiated by high temperatures. It's just that there are a lot of transitions that produce other bands of light. But the general trend is unchanged.

Meteorites don't actually burn in space because there is no resistance. After falling into the Earth's atmosphere, even without oxygen, it can still emit light and burn up. Here burning, refers to high temperatures, high temperatures produced by friction.

Such high temperatures heat the meteorite, causing it to glow, evaporate, and drag out its trail. Even if there is a real combustion process, the heat generated is far less than that generated by friction.

Glad for your question.

First of all, thank you.

You've seen the meteorite, which means you've entered the atmosphere, so there's oxygen.

Not! Let's review the conditions required for combustion, one is oxygen, and the other is that the temperature is high enough. When we normally put out fires, do you think watering is to cool down? Not really, but because it instantly blocks the contact between oxygen and combustibles.

Therefore, when the meteorite that was originally soaring at a constant speed in space (because space is vacuum), it began a long journey of friction when it entered the earth's atmosphere! Friction is the devil's pace

In this way, it seems that the heat generated by friction is high enough, and although the atmosphere is rare, there is still some oxygen involved in this strong redox reaction, so there is combustion.

nonono。Magnesium can also be burned in nitrogen. Sodium can be burned in chlorine. These are all combustion without the involvement of oxygen. Combustion does not necessarily require oxygen, but rather an accelerant. The high temperature generated by friction can ionize the air and ignite it to form a flame.

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Why can meteorites burn in space without oxygen?

Generally speaking, in addition to the Earth and the other eight planets, there are many small celestial bodies around the sun, some of which can reach tens of kilometers or hundreds of kilometers in diameter, and are as small as only a few meters or even tens of centimeters. Small objects do not have a trajectory during their travel, so they often begin to collide with each other, and smaller objects collide with each other thousands or even tens of thousands of times.

Because the speed of these small objects is very fast, much faster than the speed of ordinary bullets and shells, the impact between these small objects creates a big impact. Collisions cause small celestial bodies to collide with each other, creating high temperatures and pressures that melt minerals and rocks into molten matter, but in a variety of forms. A small object is struck thousands of times, and it produces a large amount of molten matter, which forms the outer shell of the small object.

When the impact force is greater, the molten body is larger, and the shell of the small body is thicker, and it can be seen that the thickness of the meteorite shell on Earth will reach several centimeters. Xinjiang's large iron meteorite, thick crust was formed by melt formed by thousands of impacts.

In addition to the fact that these small bodies are the main material for meteorites, there are actually asteroids that have definite orbits and will also turn into meteorites and fall on us. For example, there is a small planetary belt between Mars and Jupiter, and next to us are terrestrial planets, and we have a lot of meteorites from this small planetary belt. While they have their own orbits and don't usually collide with each other, tiny objects and space debris collide with them, changing their orbits.

As their orbits change, they become uncontrollable, colliding with other asteroids or stars. In the area of a vacuum in space, why do we see that there are tail flames behind meteorites and it looks beautiful?

Some people say that in the process of falling, the meteorite will be very fast, and then fly quickly, and the surface of the meteorite will produce high temperatures, which will combine with the free electrons in the air, and after a certain accumulation, it will release energy on the surface of the meteorite, and then turn into a burning tail flame. That's not true. Scientists who study the Earth's atmosphere have found that it has no clear boundaries, but it is also found on the Moon, the Earth's natural satellite.

This means that the Earth's atmosphere is much larger than 380,000 kilometers and could extend even further. After these results came out, scientists also believed that meteorites that entered the earth had been discovered without any reason, because the earth's atmosphere contains hydrogen, and its range and atmosphere are very wide, so the meteorite has entered the atmosphere before entering the earth, and due to the ultra-high speed caused by the high temperature, it reacts with hydrogen, so it burns and produces an tail flame.

This is because the stones in space pass through the atmosphere and fall to the ground, which comes from space, and because of the violent friction, it leads to nature.

There are many objects in space, and at the beginning of the collision between objects, there will be some high thermal reactions, and meteorites are formed. In the event of a collision, some debris will be generated. Some energy is also produced, and these energies are very huge, so they burn.

This is because meteorites fall from space and they fall from space. Because this meteorite has a certain amount of energy and is very high in heat, it will burn up in space.

Because some galaxies in space produce some stones in the process of impact, these stones form meteorites. These stones came from space. Because these meteorites move at a very high speed and rub against the air pressure, they burn.

If one day the Earth is destroyed, the Earth will eventually become a meteorite wandering universe. Know the black box of a plane crash? Meteorites also carry information, but this power is not something that ordinary people can feel.