Introduction to the Planets of the Solar System 5, Introduction to the Planets of the Solar System

Nine planets, including the Earth, form a planetary system that revolves around the Sun. The closest planet to the Sun is Mercury, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. With the exception of Mercury and Venus, all planets have moons.

Between Mars and Jupiter there are hundreds of thousands of asteroids of various sizes and shapes, and astronomers call this region the asteroid belt. In addition, there are many comets, meteors, and thin dust particles and gases in the solar system.

The mass of the sun accounts for the total mass of the solar system, and it firmly attracts all the celestial bodies in the solar system around it with its strong gravitational pull, so that they rotate around itself in an orderly and orderly manner. At the same time, the Sun, as an ordinary star, leads its members to move around the center of the Milky Way for eternity.

Metal, wood, water, fire, Saturn, earth, king, king, sea king, Hades.

At the 26th meeting of the International Astronomical Union held in Prague on August 24, 2006, a resolution on the "Definition of Planets in the Solar System" was voted and adopted, dividing the planets of the solar system into three categories: eight planets (water, metal, earth, fire, wood, earth, Uranus, Neptune), dwarf planets (Pluto, Sedna, 2003UB313, and Ceres are all classified as dwarf planets), and small bodies of the solar system (including most of the current asteroids, overseas objects, comets, and other small bodies). On September 13, 2006, the International Astronomical Union issued a proclamation naming 2003UB313 as "Eris" (ERIS), and also gave Pluto an asteroid number:

No. 134340. Pluto can no longer be called a "planet", just a "dwarf planet".

Scientists at the California Institute of Technology announced on the 29th that they had discovered the tenth largest planet in the solar system, which is twice the size of Pluto. It is 3 times as far from the Sun as Pluto. It was named 2003UB313.

At the beginning of 2004, American scientists also found a red asteroid 12.9 billion kilometers away from the earth and named it "Sedna". At the time, it was considered the tenth largest planet in the solar system. But many astronomers questioned it, and after repeated evaluations by scientists, they finally decided that it was not qualified.

It is currently believed that there are nine planets in the solar system, namely Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. Some scientists have also suggested that there are some disagreements about whether Pluto is a planet or not.

On July 29, Mike Brown and others at the California Institute of Technology announced that they had discovered a huge object beyond the orbit of Pluto, and according to their estimates, this object could be twice the size of Pluto. NASA, the funding agency for the research project, called the 2003UB313 object the "tenth largest planet" in its press release.

The solar system has 1 star, 8 planets, 4 dwarf planets, 5 asteroids, 82 moons, and more than 5 periodic comets.

The Sun is the only star and luminous object in the solar system and is the central object of the solar system. There are only eight planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

The planets of the Solar System, in Resolution 5 adopted at the 26th International Astronomical Union held in Prague on 24 August 2006, Pluto was classified as a dwarf planet and named Asteroid 134340, which was removed from the nine planets of the Solar System.

So now there are only eight large planets in the solar system. That is to say, from August 24, 2006 11, there are only 8 planets in the solar system, namely: Mercury, Venus, Earth, Mars, Jupiter, Saturn, and Uranus.

There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. In addition to Mercury and Venus, the other 7 planets have their own moons, which is a system of celestial bodies bound together by the Sun's gravity, including the Sun, planets and their moons, dwarf planets, asteroids, comets, and interplanetary matter, with the Sun located about 260,000 light-years from the Milky Way and 230,000 light-years from the edge.

The main planets of the solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Among them, the largest planet is Jupiter, and the smallest planet is Mercury. In addition, there are many asteroids in the solar system.

What planets are there in the solar system

The so-called solar system refers to the collection of all celestial bodies centered on the sun that are constrained by the sun. The solar system consists of eight planets, 173 known moons, five dwarf planets, and hundreds of millions of small bodies in the solar system.

Because the asteroids in the solar system do not have names, and there are relatively many of them. Therefore, at present, only the eight major planets in the solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.

On August 24, 2006, at the 26th International Astronomical Union, Pluto was kicked out of the ranks of the eight planets. It is combined with Ceres, Charon, Eris, Ornis, and Hauma to form a new classification - dwarf planets.

Among them, Jupiter is the largest planet in the solar system. Its diameter is 142,984 km, and Jupiter's mass is twice that of the other eight planets combined. It can be seen that Jupiter is not only the largest planet in the solar system, but also the heaviest planet.

And the smallest planet in the solar system is Mercury. Mercury has a diameter of only 4878 km and a mass of . Although Mercury is the smallest planet in the solar system, it is also the closest planet to the Sun.

The Earth is the third farthest planet from the Sun, and the Earth is the only celestial body known to have life. In addition to this, the Earth has a natural satellite - the Moon.