Pluto was kicked out of the list of nine planets, what is the reason for this?

The presence of asteroids in Pluto's orbit; Developments in the classification of celestial bodies.

Many people believe that Pluto was kicked out of the nine planets of the solar system because of its low mass. In fact, the classification of celestial bodies has been constantly changing with the development of science, and in order to distinguish the origin of celestial bodies, it is convenient to study the methods of classification. In order to improve astronomical cognition, Pluto is ranked among the nine planets, which is largely related to the definition of stars.

Planets: Orbit around the star, otherwise the moon is also considered a star; Forming a sphere under its own gravity; Planets are massive because only massive asteroids in orbit are cleared. And Pluto was kicked out of the nine planets because there were asteroids in orbit and did not meet the requirements, so they were kicked out of the nine planets.

Stars are just beginning to form, and planets are the scrap left over after star formation. Stars are formed by blowing outward winds and blowing away the matter, and the main ones with larger atomic numbers gather around the stars to form planets. The light ones are blown farther away, but are still within the gravitational range of the star.

Jupiter's eight planets are the most dense, towards the solar system, the farther away from Jupiter, the density will be correspondingly smaller, and the planets will be correspondingly smaller. <>

Pluto: Icy Planet: The surface is covered with ice, including frozen nitrogen and methane and other substances, and is about twice as dense as ice water, Pluto's mass is composed of about 66 percent rock and 33 percent ice water, to be precise, Pluto is a rocky planet with an ice crust type.

It shows that 98% is mainly liquid nitrogen, and the remaining methane, carbon monoxide and other components, so most of the material on the surface of Pluto exists in solid state. The atmosphere is thin, the surface is covered with solid nitrogen, solid methane and carbon monoxide, and the air pressure is low, only about 1/100,000 of the earth. The orbital period is long, it takes about 250 years, and the south pole of Pluto may never see the sun.

So, Pluto was kicked out of the list of the nine planets.

Because Pluto is not attracted by the sun's gravitational attraction to revolve around the sun like other planets in the solar system, its orbit suggests that it may also be influenced by other celestial bodies, and its relatively small size has led to it being kicked out of the list of nine planets.

Because Pluto is too far away from the sun to be irradiated by the sun's rays and unable to absorb solar radiation, it kicks it out of the nine planets.

But in 2006, scientists kicked Pluto out of the list of nine planets, since then, the solar system from nine planets to eight planets, then why has Pluto, which existed for 76 years, was removed from the list, scientists according to the division of celestial bodies on the classification of cosmic celestial bodies made a division, this division is not only determined by mass, there are other factors, take the classification of planets, a celestial body wants to be defined as a planet, it needs to meet these conditions.