Pluto, as a small planet in the universe, why was it kicked out of the nine planets?

Pluto is a very small planet in the solar system, and when it was first discovered, it was included in the nine planets of the solar system. The reason why he was later kicked out of the solar system planet series was because as the observation technology became more and more advanced, mankind found that Pluto was small and insignificant compared to the other eight planets, and humans later discovered planets heavier than Pluto. <>

Pluto was not originally observed by astronomers, but by astronomer Auburn who discovered that Uranus' orbit was influenced by other unknown stars. After precise calculations, scientists also confirmed the existence of another star, until the 30s of the 20th century, when this new object finally appeared in astronomers' observation glasses. For the limited technology of astronomical telescopes at that time, the volume and mass of Pluto were misjudged.

Scientists thought that Pluto was relatively large in size and mass, so they regarded Pluto as the same status as the other eight planets in the solar system, so they regarded Pluto as the ninth planet. <>

With the development of science and technology, scientists have also discovered that Pluto is actually not very large, and it seems insignificant compared to the other eight planets. And there is also a big difference between Pluto and the eight planets of the solar system, Pluto's orbit is more special, Pluto directly passes through the orbit of other planets, and Pluto's orbit is much larger than that of other planets. Further observation by scientists has deduced that Pluto is most likely a small part of a large original star that was shattered by impact.

Another difference is that the moons of other planets revolve around the planet, while Pluto's moons form a semi-star system with them. <>

All of the above reasons are combined, and it is not difficult to find that Pluto is very different from the eight planets of the solar system. Therefore, astronomers kicked Pluto out of the series of nine planets in the solar system after considering various factors. Some netizens feel that Pluto is special because of its name, but in fact, Pluto is just a very ordinary star in the solar system.

Because Pluto is very different from other planets, not only is the orbital plane 17 degrees different from the orbital plane of the solar system, but also has a very long orbital period, so it will be kicked out.

Because Pluto was unable to destroy other stars in orbit on its own except for its moons, it was kicked out of the nine planets.

Because Pluto is too small to meet the criteria of a large planet and can only be considered a dwarf planet, Pluto was kicked out of the nine planets.

Pluto is currently a dwarf planet. A long time ago, everyone may know the nine planets of the solar system, these nine planets are: Mercury, Venus, Earth, Mars, Saturn, Jupiter, Uranus, Neptune and Pluto, and later scientists found that Pluto does not seem to fit the characteristics of the planets, so Pluto was removed and downgraded, so the nine planets became the eight planets.

Pluto is about 70 kilometers from the Sun, and it takes 5 hours for the sun's light to reach Pluto, which is a very long time. At the same time, it also means that Pluto is very cold, its day and night temperature are basically the same, it is located outside the cold zone of the solar system, and Pluto because its orbit and the ecliptic are very consistent, and its mass and distance are consistent, and finally the International Astronomical Union decided to name Pluto the ninth planet.

Later, with the continuous development and progress of science and technology, scientists have discovered several celestial bodies similar to Pluto, and their size is generally larger than Pluto, this celestial body is Eris, and observing other planets at the same time, you will find that they all have their own moons, and although Pluto has satellites, their mass is too small to have this characteristic of planets.

In the end, the International Astronomical Union voted unanimously at the 2005 World Astronomical Congress to remove Pluto and downgrade it to a dwarf planet, and astronomers later decided that Planet Nine must be defined again. But when astronomers discovered Sedna, the decision was canceled, and the solar system became eight planets.

But there are still many scientists who believe that there is a ninth planet in the solar system, and that it may be very large, but because it does not emit light, it is like looking for a needle in a haystack to find it in the vast solar system. The reason why Planet 9 is believed to exist is that the solar system is so large that it has a diameter of 2 light-years, and it takes 2 years to fly out of the solar system at the speed of light.

It is clear that scientists have not given up the search for Planet 9, and there have been many international competitions to discover Planet 9, but at present, none of the candidates meet the characteristics of Planet 9, and scientists have begun to simulate the environment and orbit of the planet Earth in the laboratory. As for discovering it, it is still a fantasy for now.

Mainly because Pluto is particularly small. Moreover, this trajectory parameter of Pluto is completely different from that of the Sun, so it is excluded. It also does not meet the requirements of this planet.

This is because after studying the planets, people found that Pluto is too small. Not enough to be the nine planets.

Because Pluto is very far away from the Earth and relatively small, with the development of science, scientists have discovered that Pluto does not belong to the planetary series.