Who knows which of the 9 planets has been deleted

Pluto, too small and too far from the Sun, has been planned as a dwarf planet by a show of hands by 2,500 international astronomers.

Pluto Pluto (pronounced: míng wáng xīng) was originally thought to be a large planet in the solar system, but at the 26th International Astronomical Union held in Prague on August 24, 2006, Pluto was designated as a dwarf planet by Resolution 5. In June 2008, the International Astronomical Society (IAA) reclassified Pluto as a subtaxonomic pluto dwarf planet.

Pluto! Pluto, or asteroid 134340, is the twelfth largest object in the solar system that revolves around the Sun. However, at the 26th session of the International Astronomical Union, held in Prague on 24 August 2006, resolution V was adopted to classify Pluto as a dwarf planet.

A planet with a cool name – Pluto.

Because there is no capital to be a planet, it was opened out of the solar system.

Pluto! Included as a dwarf planet.

A planet in the dark of the solar system.

Here's why:

Nine planets used to be a popular term, but since the International Astronomical Union in 2006, when it voted to downgrade Pluto as a dwarf planet, there have only been eight planets in the solar system.

In Resolution 5, adopted at the 26th session of the International Astronomical Union held in Prague on 24 August 2006, Pluto was classified as a dwarf planet and removed from the list of nine planets in the solar system. Dozens of other planets larger and heavier than Pluto did not crowd the ranks of the stars, and the solar system became eight planets, while Pluto was relegated to a dwarf planet.

Characteristics of the Eight Planets:

Jupiter-like planets, including Jupiter and Saturn, are mainly composed of liquefied gas, are much larger in volume and mass than terrestrial planets, are farther from the Sun, less dense, are located outside the asteroid belt, and have halos.

Perihelio-solar planets, including Uranus and Neptune, are between the first two in volume and mass, the furthest from the Sun, are composed mainly of solidified gases, are also densely so, have lower surface temperatures, and have halos.

Jupiter is the largest of the eight planets, enough to fit the other seven. Neptune is the farthest of the eight planets from the Sun and has a pale blue light. Venus is the second closest planet to the Sun.

Because it never rains on Venus, the entire planet is covered in dust and very arid throughout the year.

YesPluto!

In 1930, Clyde Townbaugh of the United States discovered Pluto and considered it the ninth planet.

Since Pluto is so faint and small, its size cannot be determined long after its discovery. It was first estimated to have a diameter of 6,600 kilometers and a mass comparable to that of Earth. Due to the development of observational techniques, estimates of Pluto's mass were revised downward throughout the 20th century.

Calculations made in 1948 reduced Pluto's mass to about the mass of Mars. Observations in 1976 made it so that the mass does not exceed the mass of the Earth.

of 1. In 1978, Pluto's moon Charon.

For the first time, Pluto's mass was correctly measured, and the result was about the mass of the Earth, and the diameter was also reduced to a kilometer.

From 1992 onwards, many objects of the same volume as Pluto have been discovered, suggesting that Pluto is only a Kuiper Belt object.

One of the members. This has made its planetary status controversial, with many questioning whether Pluto should be considered alongside or separately from the surrounding celestial bodies.

In August 2006, the International Astronomical Union adopted a resolution creating a formal definition of the term "planet". According to the resolution, the solar system.

There are three conditions for an object to be considered a planet: 1Celestial bodies must revolve around the Sun.

2.The celestial body must be large enough to form a spherical shape through its own gravitational pull. More specifically, its own gravity should pull it into the shape defined by hydrostatic equilibrium.

3.The celestial body must clear the area near its orbit.

Since Pluto only meets the first two of the planetary definition and does not meet the third, it is kicked out of the ranks of large planets and demoted to a dwarf planet.

Pluto!

As we all know, the ninth planet was artificially removed.

Pluto was discovered by scientists in 1930 and has since been recognized as the ninth planet in the solar system. How was Pluto kicked out of the solar system as a planet later, because with the improvement of science and technology, human observation methods have become more and more powerful, and scientists have discovered many strange things about Pluto. The first is that the orbit is unstable, and there are many other objects in or near Pluto's own orbit, some of which are about the same size.

All of this has left scientists confused and beginning to recognise and define Pluto.

In 2006, scientists convened a planetary conference, which adopted a planetary definition document by an overwhelming majority. The document sets out several defining conditions for the planets of the solar system, first of all, the mass should be large enough, circular, and revolve around the sun. Pluto is eligible, although it is smaller than our moon, but it is still big enough, Pluto is also round and revolves around the sun.

The second is to have a fixed orbit, Pluto's orbit is located on the outermost side of the other planets, and it is at a certain angle to the orbits of other planets, which is slightly different from this planet, but it is still eligible.

Finally, the planets must empty other celestial bodies in their orbits, just like the other eight planets, there are no other celestial bodies in their orbits except their own moons. Pluto has not yet done this, and there are other objects in its orbit, some of which are about the same size, which may have something to do with its location in the Kuiper Belt, and in addition to that, its orbit intersects Neptune. The condition of emptying its orbit is something that Pluto does not meet, and it is precisely because of this that Pluto has been disqualified as a planet by scientists.

Recently, however, some scientists have called for Pluto's planetary status to be reinstated. In addition, scientists have observed the movements of other celestial bodies in the solar system, which may allow scientists to discover the real ninth planet.

Because Pluto has been kicked out by humanity. The first is that Pluto's volume and mass are too small to meet the standards of a planet. Second, Pluto is located in the Kuiper Belt, and there are other celestial bodies in its orbit.

So, we removed Pluto from the nine planets just because it is small, of course not, if so, then we would not have added it to the nine planets in the first place, to find out the reason for Pluto's delisting, it has to go back 16 years, that is, in 2002, here, first of all, a brief science popularization, at the edge of the solar system, there is a Kuiper belt around the periphery of Pluto, and there are many objects of different sizes in the Kuiper belt, In 2002, scientists discovered a planet called Kwawa on the Kuiper Belt, and in 03 they discovered a planet called Xena on the periphery of Pluto, both of which are above Pluto in size and weight, if Pluto is a planet, then these two planets are undoubtedly planets.

Pluto Pluto was discovered by Clyde Tombaugh in 1930 and considered it the ninth planet. The discovery of a number of ice-made objects in the Kuiper Belt after 1992 with a mass similar to that of Pluto challenged Pluto's status as a planet.

In 2005, the discovery of Eris was even 27% more massive than Pluto, and the International Astronomical Union (IAU) officially defined the concept of planets the following year. The new definition excludes Pluto from the planetary range, classifying it as a dwarf planet (Pluto-like object).

Pluto, or asteroid 134340, is the twelfth largest object in the solar system that revolves around the Sun. It was discovered in January 1930 and named after Pluto in Roman mythology (Hades in Greek mythology), which translates to Pluto in Chinese. Originally, it was thought to be a large planet in the solar system, but at the 26th International Astronomical Union held in Prague on 24 August 2006, Resolution V was adopted to classify Pluto as a dwarf planet.

The Pluto thing is like this, a man discovered the tenth largest planet, Eris, which redefined the planets of the solar system at the time of the review.

1. Planets need to be spherical.

2. Rotate around the sun.

3. Be clear about other celestial bodies in orbit.

It's 3 brushes off Pluto.

Pluto! In Resolution No. 5 adopted at the 26th International Astronomical Union held in Brag on 24 August 2006, Pluto was classified as a dwarf planet and named 134340, removing it from the nine planets of the solar system. So now there are only eight planets in the solar system.

Pluto is reclassified as a dwarf planet.

It is so that Pluto is lined up with plane trees that are already leafy and lush. So that I don't have nothing to think about when I leave the mirror. The smoke of your dreams is clouded with a delightful dark red.

Following the International Astronomical Union Assembly on 24 August 2006, Pluto was downgraded to a dwarf planet by a vote, leaving only eight planets in the solar system. The "Nine Planets" statement has become history, replaced by the "Eight Planets".

Pluto is the smallest of the nine planets, and much smaller than those eight. Pluto is only about 2,300 kilometers in diameter, which is smaller than Earth's moons. Its orbit is also very special, having an angle to the orbits of the other eight planets.

Especially after the discovery of Xena in 2003, Pluto's status was further shaken.

Revelation! Nine planets become eight planets, why is there one planet not among them?

At 8:30 Beijing time, the voting results of more than 1,000 astronomers of the United Nations Astronomical Association --- changed from 9 planets to 8 planets. Pluto was culled from the position of the ninth largest moon in the solar system (the only planet discovered by the Americans) on the grounds that; 1. Pluto is too massive, 2. Its orbit is not in a circular orbit around the sun, but in an elliptical orbit.

A planet is a celestial body orbiting the Sun whose gravitational pull is sufficient to restrain its rigid physical strength and give it a spherical appearance, which can clear other objects in the vicinity of its orbit. But Pluto is not able to clear objects from other objects in the vicinity of its orbit. So Pluto was removed from the nine planets and downgraded to a dwarf planet.

The nine planets used to be popular, and now the eight planets are the last planets to be discovered, Pluto.

Because Pluto is in orbit beyond Neptune, it belongs to the Kuiper Belt on the outer part of the solar system, and this region has always been the birthplace of asteroids and comets in the solar system. Since the 90s of the 20th century, astronomers have discovered that Kuiper has more large bodies orbiting the sun. For example, the American astronomer Brown discovered "2003UB313", which is a celestial body with a diameter and mass greater than Pluto.

Therefore, it is not difficult to understand the change from "nine planets" to "eight planets".

Because the other is only made of gas, not a planet.

Nine planets.

In descending order: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury, Pluto. Of these, Pluto has been ruled out.

Since the 90s of the 20th century, astronomers have discovered that Kuiper has more objects orbiting the Sun and are larger than Pluto. For example, the American astronomer Brown discovered "2003UB313", which is a celestial body with a diameter and mass greater than Pluto. Therefore, it is not difficult to understand the change from "nine planets" to "eight planets", otherwise the solar system will be "overflowing with planets".

The nine planets "orbit the Sun in their respective orbits, and their orbits vary in size, at different speeds and periods, and are usually scattered in different regions of the solar system." After a certain period of time, the nine planets will converge in a spiral shape in a fan-shaped region with a small angle, a phenomenon that people call "beads".

Planetary Definition: The 2006 International Astronomical Congress gave a clear definition of planets.

One is that it must be a celestial body orbiting a star.

The second is that the mass is large enough to rely on its own gravity to make the celestial body spherical.

The third is that there should be no other celestial bodies in the vicinity of their orbits, or they can "clean" themselves in orbit within 3 billion years.