Why can't asteroid belts form planets?

The asteroid belt lies between Mars and Jupiter, both of which are planets. The asteroid belt is formed by dust and gravel in the primitive solar nebula. It is reasonable to form a planet, but why not condense into a planet? Then let the constellation knowledge reveal the secret for everyone!

Why can't asteroid belts form planets? The asteroid belt is an annular region with a width of 400 million kilometers. The average distance of earth-moon system is only 0.96‰ of its width, which shows that the asteroid belt is vast. In this area, it is estimated that there are more than 500,000 small celestial bodies, which is almost equivalent to the distance between several earth-moon system, to meet a celestial body.

So how did asteroids form? When astronomers calculate the distribution of planets in the solar system, they find that there are no large celestial bodies-planets in the asteroid belt, and they are all asteroids except Ceres, which is barely large. Some scientists therefore doubted whether there was a large celestial body here, but it was later hit and shattered into various small celestial bodies.

However, it has also been pointed out that even if all the celestial bodies in the asteroid belt are aggregated into a large celestial body, its diameter will not exceed 1500 km. In contrast, Pluto, which was expelled from the planetary sequence, is close to 2400 kilometers in diameter.

Because of this, astronomers suspect that the asteroid belt has never formed a complete large celestial body, which may be due to the gravitational disturbance of Jupiter, a giant. Under the repeated interference year after year, these asteroids, which were originally aggregated into a single celestial body, are evenly distributed on the solar system disk of the entire asteroid belt.

Therefore, in the shadow of Jupiter, even in the future, it is impossible to predict that the asteroid belt will form large celestial bodies. Perhaps this pattern will last forever until the sun becomes a white dwarf at some point in the future, which can break this balance.

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