What is the origin of asteroids?

According to the laws of the universe, the nine planets in the solar system all have their own orbits, and there are corresponding distances between them. Therefore, when people find that the distance between Mars and Jupiter is too large, some people conclude that there should be a planet in the middle.

The famous scientist Kepler first noticed this phenomenon. Soon, the German Titius also calculated the astronomical unit of the planet from the sun, and the long wave of the Berlin Observatory also calculated the time for the planet to orbit the sun once. Many scientists took great interest in this matter and conducted research, but there was no result.

/kloc-At the beginning of the 9th century, Piazi, director of the Italian Sicilian Observatory, accidentally discovered a star that he had never seen before while observing Taurus. After calculation, it was similar to the planet people were looking for, so they named it Seles.

Seles is obviously smaller than other planets in the solar system. Its diameter is more than 700 kilometers, which is116 of the earth's diameter. People keep looking. 1In March, 802, German doctor Olbers discovered the second asteroid Pallas Athena.1In June, 804, German astronomer Haddington discovered the third asteroid Venus.1In June, 807, Olbers discovered the fourth asteroid Vesta. Later, many asteroids were discovered here.

Where did so many asteroids come from? 1807, Olbers put forward a hypothesis about the origin of asteroids. He thought there was a big planet between Mars and Jupiter, and then it exploded for some reason. Those asteroids are fragments of its explosion.

American astronomer kuiper put forward the collision theory. He believes that these asteroids are fragments produced by collisions between planets.

The school represented by Swedish physicist Alvin and former Soviet astronomer Schmidt put forward the "finished product theory". They believe that in the early days of the solar system, asteroids, like planets, were born from primitive nebulae, and other planets were fully developed. These asteroids have not become big planets for various reasons, but exist in the form of semi-finished products.

There are many other hypotheses about the origin of asteroids. Which one is correct needs further exploration to get the answer.