What exactly is the principle of meteors falling from the sky ?

Every summer evening is the best time to look at the stars and look up at the starry sky.

The sky is full of stars hanging upside down, so beautiful. When we are looking at the stars, we occasionally find that there are stars "falling", which is actually a meteor, so why do meteors "fall"?

In fact, most of the stars in the night sky that we can see with the naked eye are glowing stars that are similar to the sun, and they do not fall. Solar system.

The members are the sun, planets, dwarf planets.

Asteroids, moons, and comets.

In fact, in addition to these stars, there are many solid particles in the solar system, called meteoroids.

They also orbit the Sun, as meteoroids pass near the Earth in their orbit. Subject to the gravitational pull of the Earth.

may break into the Earth's atmosphere.

Meteoroids move particularly fast relative to the Earth. During the fall, it interacts with the Earth's atmosphere and emits light, resulting in the meteor phenomenon we see. But they're so fast, will they hit people?

In fact, you don't have to worry about this problem, the probability of them hitting people is very small. Because most of the meteoroids are very small, they have been exhausted in the process of landing, and they cannot reach the earth's surface at all, and only a very small number of slightly larger meteoroids can reach the earth's surface, and the remaining part is a meteorite. Moreover, the ocean on the earth is much larger than the land area, and there are many barren mountains, deserts and other places where there are no people on the land, and the proportion of places where people really live on the earth is very small.

So even if a slightly larger meteoroid can reach the earth's surface, the probability of hitting a person is very small.

Meteor shower. When the comet is close to the Sun, the volatile matter will evaporate and release the dust particles with it, forming the comet and the tail of the comet. The comet shrinks every time it passes near the Sun.

At the same time as the formation of coma and comet tail, there will also be a large number of dust particles scattered on the track. When the earth passes through the orbit of a comet, these scattered particles are attracted by the earth and enter the earth's atmosphere, which forms a meteor shower, of course, making a wish for a meteor shower, which is also people's yearning for a beautiful thing.

Mainly because of the influence of gravity in the process of movement, some are also because of the accidental movement to the trajectory of other planets, and then they will suddenly fall down.

This is because meteors are affected by the Earth's gravity during their motion, which changes their original trajectory and then passes through the atmosphere.

Because meteors are formed as a result of meteorite collisions, meteorites fall after collisions, so we think that meteors fall from the sky.

It is because some space meteorites will have the phenomenon of friction when they enter the atmosphere, so they will feel like they are falling.

Meteors are attracted to the planet due to the perturbation of the planet's gravity when approaching the planet, thus entering the planet's atmosphere, and rubbing with the atmosphere to produce a trail of light.

There are three types of meteors: single meteors (occasional meteors), fire meteors and meteor showers, and meteoroids that are a little larger than mung beans can form meteors with visible brightness when they enter the atmosphere. If a meteoroid falls to the ground before it is completely burned out in friction, it becomes a meteorite or meteorite. At a certain time of year, when the Earth enters the meteoroid body orbiting the sun, the sky will see as few as a few, as many as hundreds of meteors burst out in the direction of a constellation at night, which is a meteor cluster (a group of more than 100 meteors in one night can be called a meteor shower).

Tens of billions of meteoroids enter the Earth's atmosphere every day, bringing us a wealth of information about the formation and evolution of celestial bodies in the solar system.

In addition to the sun, the eight planets and their moons, asteroids, and comets in the solar system, there are also a large number of dust particles and tiny solid masses in interstellar space, which also move around the sun, and they are collectively called "meteoroids". The mass of meteoroids is generally less than 100 tons, and most meteoroids are just small solid particles.

Some meteoroids revolve around the Sun in groups along similar orbits, but the perihelion is in different sequences, and they form "meteoroids (groups)"; Some meteoroids are like stragglers, orbiting the sun individually. When a meteoroid passes near the Earth in orbit, it will be affected by the Earth's gravity and will break into the Earth's atmosphere at high speed, rubbing against the atmosphere and converting kinetic energy into heat energy.

It makes meteoroids ablate and glow, and some become bright fire meteors. On a clear night, a bright light pierced the night, which is a meteor phenomenon that almost everyone has seen. Normally, there are about 10 meteors seen by the naked eye in a night, and they are like "stragglers" in the night sky, completely random in all directions and sky regions, and it is difficult to predict when meteors will appear.

Such meteors are occasional meteors; There is also a group of meteors that often appear in groups, which have a very obvious regularity, appearing on roughly fixed dates and the same celestial range. Hence the call periodic meteors or meteor swarms. A meteor swarm is a group of meteoroids with roughly the same orbit, and when they meet the Earth, they are affected by gravity and rub against the atmosphere when they fall into the Earth, becoming quite magnificent meteor showers.

Meteoroids originally moved around the Sun, and when they passed near the Earth, they were affected by the Earth's gravitational pull and changed their orbit and entered the Earth's atmosphere.

They fly into the Earth's atmosphere, where they rub light and heat against the atmosphere, and finally, meteors are usually cosmic sand particles that break into the Earth's atmosphere from space, moving so fast in the air that they are able to knock out electrons from air atoms, thus forming a plasma region (also known as ionization) around them.

Meteoroids are large groups of meteoroids that travel through interstellar space in large quantities and orbit the Sun in large quantities, called meteor swarms. Among them, the stony ones are called meteorites; The iron is called meteoric iron.

The reason why meteors fall to the earth is because when the meteor approaches the earth, it is affected by the earth's gravity, which enters the earth's atmosphere and causes friction with the atmosphere.

Most meteoroids are depleted before they fall to the ground, and a small number fall to the ground, called meteorites. Most visible meteoroids are about the size of a grain of sand and weigh less than 1 gram. Meteoroids enter the atmosphere at speeds between 11 km s and 72 km s, and the color of each meteor varies depending on how hot it is.