The probability of an asteroid hitting the earth

The probability of an asteroid hitting the earth is about 1 ~ 10 km, and the probability of an asteroid hitting the earth over 10 km is1/50000. The specific explanation is as follows:

1, the number and distribution of asteroids: astronomers have discovered many asteroids, but there are still a lot of asteroids that have not yet been discovered. Some of these unknown asteroids may hit the earth. Orbit of Asteroid: The orbit of Asteroid is dynamic, which is influenced by the gravity of other celestial bodies in the solar system and the interaction between asteroids.

2. Gravity: Gravity will change the orbits of asteroids, making them easier to be captured or escaped. At the same time, the gravity of the earth will also affect the material distribution on the surface of asteroids, making some areas more vulnerable to impact. Size and speed of asteroids: the size and speed of asteroids will affect their probability of hitting the earth.

3. Observation and prediction technology: At present, astronomers have developed many technologies and methods to observe and predict the orbit and motion of asteroids. The development and perfection of these technologies will help to better predict the probability of asteroids hitting the earth. Based on these factors, it is difficult to accurately predict the probability of an asteroid hitting the earth.

Knowledge about asteroids

1. Asteroids are mainly distributed in the main asteroid belt between Mars and Jupiter, but there are also some asteroids whose orbits intersect with those of planets such as Earth and Mars, so they may collide with these planets. The naming right of asteroids usually belongs to the discoverer, but some asteroids are named for historical, cultural or other reasons.

2. Asteroids vary in shape and size. Some asteroids are very irregular, while others are spherical or nearly spherical. The mass of asteroids also varies widely, ranging from a few kilograms to tens of millions of tons. Although the probability of an asteroid hitting the earth is low, there are still some risks.

3. The surface of asteroids is usually rough, with many craters and cracks. These characteristics can provide important information about the formation and evolution of asteroids. In addition, some asteroids have obvious magnetism, which indicates that they may contain a lot of metal elements such as iron and nickel.