Meteor is a kind of light trail produced by the meteoroid (usually including cosmic dust particles and solid blocks) moving in the interstellar space, which is attracted by the earth due to the perturbation of the earth's gravity when approaching the earth, and then enters the earth's atmosphere and rubs and burns with the atmosphere. Meteoroids originally move around the sun. When they pass near the earth, they change their orbit and enter the earth's atmosphere due to the gravity of the earth.
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Encyclopedia of meteors
Meteor is a kind of light trail produced by the meteoroid (usually including cosmic dust particles and solid blocks) moving in the interstellar space, which is attracted by the earth due to the perturbation of the earth's gravity when approaching the earth, and then enters the earth's atmosphere and rubs and burns with the atmosphere. Meteoroids originally move around the sun. When they pass near the earth, they change their orbit and enter the earth's atmosphere due to the gravity of the earth. There are several kinds of meteors, such as single meteor, fireball and meteor shower. Most of the visible meteoroids are similar to sand particles, weighing less than 1 gram. The velocity of meteor entering the atmosphere is between 11km / s and 72km / s.
Why do meteors appear in the sky?
Meteor, is a kind of interplanetary matter that breaks into the atmosphere and rubs with the air in the atmosphere. In the space near the earth, there are all kinds of interplanetary matter besides other planets. This kind of interplanetary material is called meteoroid, small like dust, big like a mountain, in space according to their own speed and orbit. When they collide with the earth, the speed of meteoroids relative to the earth's atmosphere is very high, reaching 10-80 kilometers per second, dozens of times faster than the fastest aircraft. When a meteoroid penetrates into the earth's atmosphere at such a high speed, it rubs violently with the atmosphere and burns, heating the air to thousands or even tens of thousands of degrees centigrade. Under the action of such a high temperature airflow, the meteoroid itself also vaporizes and emits light. The burning of meteoroids in the atmosphere is not finished all at once, but gradually with the movement of meteoroids, thus forming arc light. There are two kinds of meteors, one is a single occurrence, the other is a mass meteor shower like raindrops.