Why is Pluto not a planet, can you talk to everyone about it?

Do you know why Pluto is not a planet? What is the reason that the nine planets of the solar system have become eight planets? Before 2005, everyone thought that our solar system had nine planets, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and of course, Pluto.

Pluto is the smallest of all these celestial bodies. Pluto was discovered by an American astronomer in 1930, and since then, everyone in the world has known the nine planets.

But one day in August 2006, scientists gathered at the International Astronomical Union in Paris and declared that Pluto was not a planet, which shocked the world and Pluto was removed from it. Now the question arises, why is Pluto no longer a planet? According to the International Astronomical Union, for a celestial body to become a planet, it needs to meet three basic criteria.

Firstly, the celestial body should revolve around the sun, secondly, the celestial body should be spherical, and thirdly, the area around its orbit should be clean and there should not be any celestial bodies of equal size or larger. This means that with the help of its gravitational pull. On this planet should be cleared of asteroids and dwarf planets on its side.

The planet is a planet because it is the dominant gravitational body in this orbit (other objects in and around the planet's orbit should be centered on the planet), but Pluto does not meet this criterion, and there are many Pluto-like objects in and around the orbit of Pluto, and the mass is not much different from that of Pluto. Pluto is only twice as massive as the other objects in its orbit. If Pluto can be considered a planet, then other celestial bodies inside and outside this orbit should also qualify.

Pluto is lovely and orbits the sun. Yes, he did meet the first two conditions, but scientists found that it did not meet the third criterion because it did not clear the adjacent celestial bodies around its orbit, therefore, it could not be called a planet and was downgraded to a dwarf planet. Since then, Pluto has not been among the planets of the solar system, and the nine planets have become eight planets.

This is because Pluto is not in the same orbit as other planets, and it is far away from other planets. I cannot connect it.

Pluto was first discovered as a planet, but later on, based on repeated observations by astronomers, it was found that it was too small, even smaller than some moons, so it was not classified as a planet.

The reason why Pluto is not a planet is because it has been shrinking and has shrunk to the size that it should be when it exits the planet, so it is judged not to be a planet.

Because Pluto is mostly liquid rather than solid, and Pluto is too far away from the Sun and does not need to depend on the Sun to survive at all.

Pluto's mass does not belong to the planets.

In 1930, the American astronomer Tombo discovered Pluto, but miscalculated the mass at that time, thinking that Pluto was larger than the Earth, so he named it a large planet.

Since the day it was discovered more than 80 years ago, Pluto has been associated with the word "controversy."

One is because the process of its discovery is based on a false theory;

The second is that because of the wrong estimation of its mass, it was mistakenly included in the ranks of large planets.

However, new astronomical discoveries continue to call into question the traditional notion of the "Nine Planets". Astronomers have discovered some differences between Pluto and other planets in the solar system. Pluto is in orbit beyond Neptune, in the Kuiper Belt on the outer part of the solar system, an area that has long been the birthplace of the solar system's asteroids and comets.

Mercury and Pluto are both low-mass planets. Why is only Pluto excluded? Pluto was furious at the mention of this, what do you use to hurt people is always me?

Pluto: A word we often say when we hold silver"It's the mule, it's the horse that comes out and slips", Pluto is not on the same level as Mercury, isn't it clear how to compare it? Two rounds can decide the winner.

<> first round starts with comparing diameters. The diameter of Pluto is 2, km. The diameter of Mercury is 4880 km.

Mercury is a little over twice as large as Pluto. Pluto may be a little smug after comparing its own diameters"Mercury isn't much bigger than me either! "。

Jupiter's moon Ganymede (5,262 km in diameter) and Saturn's moon Titan (5,150 km in diameter) are both larger than Mercury. We are half a pound and eight taels. "

Pluto and Mercury we compare mass. Pluto has a mass of x 10 22 kg. The mass of Mercury is x 10 23 kg.

Mercury is twice as massive as Pluto. Pluto looked at the mass of Mercury and said:"No way.

Why is the mass of Duan Shen Yan Water Blind Potato Star so much larger than mine? "From the comparison of Pluto and Mercury, I think we can see that Pluto and Mercury are not at the same level at all. Mercury is twice the diameter of Pluto, 8 times the volume of Pluto, and twice as massive as Pluto.

Not only is Mercury much more massive than Pluto, but it is twice as massive as Europa and twice as large as Enceladus. Both planets are larger than Mercury.

Why is this so? The reason is that Mercury is very dense. Mercury has an average density of grams of cubic centimeters, making it the second densest object in the solar system.

Mercury is second only to Earth in density and is g cc. Scientists believe that Mercury is made up of 70% metal and 30% silicate. Mercury is like a giant lump of iron.

Pluto is an icy planet. Its average density is only grams per cubic centimeter. The average density of Mercury is almost three times that of Pluto.

The reason why Pluto is not a planet is because over the years there have been many planets that are the same size as Pluto, and some stars are even larger than Pluto, so in order to prevent the appearance of a wide range of stars, the certification standards for planets have been raised a lot, resulting in Pluto not being able to meet the existing standards.

First of all, because Pluto is not very large in size. The planet's request for a reprieve was not reached. And the bucket is changed and the density is very small. It also does not meet the requirements of the planet, so it will be kicked out of the ranks of the destroyers.

Because the nature of Pluto has changed, and the previous scientists' observation of the stars has been skewed, the attendant Jian Yixiang will kick Pluto out of the ranks of the stars.

BEIJING, May 30 (UPI) -- Pluto has long been "expelled" from the family of large planets and downgraded to a dwarf planet. A new analysis suggests that it may not be a planet at all, but a "giant comet" formed by a cluster of nearly 1 billion comets.

The main component of Pluto's atmosphere is nitrogen, and the giant glaciers on the surface of the Sputnik Plain are also made up of nitrogen-rich ice. Nitrogen is to Pluto's geological activity what water is to Earth.

Researchers from the Southwest Research Institute of the United States published in the International Journal of Solar System Research in the United States** that they combined and analyzed the observation data of Pluto by the NASA "New Horizons" probe and the observation data of the European Space Agency's "Rosetta" probe on Comet Churyumov Gerasimenko, and found that the nitrogen abundance of Pluto is consistent with the aggregation of about 1 billion comets.

The planets in the solar system are formed by the condensation of dust disks around the sun, and the comets may originate from the "Oort clouds", a frozen cloud in the outer solar system, which have very different chemical compositions. New research suggests that Pluto's composition is more similar to that of a comet, with the difference that there is less carbon monoxide on Pluto's surface.

Pluto's carbon monoxide may have been buried under nitrogen ice or consumed by reacting with liquid water, the researchers said. The New Horizons probe found that there may be an ocean of liquid water a few kilometres below the ice on Pluto's surface, but it is not yet possible to know for sure due to insufficient data.