Please give us a detailed introduction to the size of the nine major planets, the more comprehensive

Eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Some "astronomers" privately classify Pluto as a "dwarf planet", but it is difficult to justify it.

For decades, scientists generally believed that there were nine planets in the solar system, but with the discovery of an object larger and farther away than Pluto, the debate over Pluto's status as a large planet has intensified. 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. Therefore, at the Congress of the International Astronomical Union, whether to "correct the name" of Pluto has become the focus of the conference, for which astronomers have given various proposals.

On August 24, 2006, the 26th General Assembly of the International Astronomical Union, voted by more than 2,000 astronomers - There are only eight planets in the solar system. Pluto, one of the traditional nine planets, is no longer considered a planet, but is included as a "dwarf planet". Because according to the "conservative new planetary definition":

One is a celestial body that must orbit the sun; Second, 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 objects near its orbit. Pluto does not match the last two conditions, Pluto's orbit is intersected with Neptune In 1930, the American astronomer Tombo discovered Pluto and defined it as a large planet. Too much.

1. Jupiter:

Diameter: 142,984 km (equator).

Mass: kg.

2. Saturn saturn:

Diameter: 120,536 km (equator).

Mass: kg.

3. Uranus uranu:

Diameter: 51,118 km (equator).

Mass: kg.

4. Neptune:

Diameter: 49,532 km (equatorial).

Mass: kg.

5. Earth :

Diameter: 12, km.

Mass: kg.

6. Venus Venu:

Diameter: 12, km.

Mass: kg.

7. Mars mar:

Diameter: 6,794 km.

Mass: kg.

8. Mercury:

Diameter: 4,880 km.

Mass: kg.

9. Pluto:

Diameter: 2274 km.

Mass: kg.

The masses of the nine planets of the solar system. Science and technology are becoming more and more developed, and scientists have used scientific methods to ** several major planets around the earth, and I believe that many people are curious about the quality of other planets. So let me take you to learn more about the masses of the nine planets in the solar system.

1. Mercury: mass kilograms

Mercury is the closest to the Sun and is the second asteroid in the solar system. Mercury is smaller in diameter than Ganymede and Titan, but it is heavier.

2. Venus: mass kilograms

Venus is one of the eight planets in the solar system, and is the second planet in descending order from closest to the sun. It is the closest planet to Earth (Mars is sometimes closer). The orbital period is Earth Day.

3. Earth: mass kilograms

Earth is one of the eight planets in the solar system, the third in order of near and far from the sun, and it is also the terrestrial planet with the largest diameter, mass and density in the solar system, 100 million kilometers away from the sun.

4. Mars: mass kilograms

Mars is one of the eight planets in the solar system, the fourth planet in the solar system from the inside to the outside, and is a terrestrial planet, with a diameter of about 53% of the Earth and a mass of 11% of the Earth. The inclination angle of the axis of rotation and the rotation period are similar to those of the earth, and one revolution is about twice the time of the earth's revolution.

5. Jupiter: Mass kilograms

Jupiter is the largest and fastest rotating of the eight planets in the solar system'Planet, the fifth planet from the inside out. It has a mass of one-thousandth the mass of the Sun and a mass of the other seven planets in the Solar System combined.

6. Saturn: mass kilograms

Saturn, one of the eight planets in the solar system, is the 6th closest to the Sun (from near to far). mass, second only to Jupiter in diameter. and Jupiter, the same gas giant. In ancient Europe (ancient Greece), Saturn was called Cronos, and in ancient China, it was also called Zhenxing or Filling.

7. Uranus: mass 13 10 kg

Uranus is the seventh planet (astronomical unit) in the solar system from the inside out, the third largest planet in the solar system (larger than Neptune) and the fourth most massive (smaller than Neptune), lying almost horizontally orbiting the Sun.

8. Neptune: Mass kilogram (17 times the mass of the Earth).

Neptune is the far-reaching planet of the eight planets, and Neptune is the eighth planet in terms of planet distance from the Sun, the fourth largest planet in diameter, and the third largest planet in mass. Its brightness is only equal and can only be seen in astronomical telescopes.

The mass ranking of the eight planets is as follows:

1. The first largest quality: Jupiter, quality:

2. The second largest mass: Saturn, the mass of the world: kg

3. The third largest mass: Neptune, mass:

4. The fourth largest mass: Uranus, mass:

5. The fifth largest mass: the earth, the mass ratio:

6. The sixth largest quality: Venus, quality:

7. The seventh largest mass: Mars, mass:

8. The eighth largest mass: Mercury, mass:

Expansion of information training and closed materials:Jupiter is twice the mass of all 7 other planets combined, 318 times the size of Earth, and 1,316 times the volume of Earth. Known as the "King of the Planets".

Jupiter and the Sun are very similar in composition, the maximum diameter that a gas planet can reach, but it does not burn up like the Sun because it is too small. If the composition is increased again, it will be compressed by gravity, increasing the global radius only slightly. But for Jupiter to become a star like the Sun, it would have to become at least 70 times more massive.

Encyclopedia – Eight planets.

Categories: Education Science >> Science Radical Technology.

Problem description: Now that the 10th largest planet is in an uproar, I deeply doubt whether the few small celestial bodies found in the outer solar system can be classified as Richey's list of major planets. Personally, I think that Pluto is a bit of a big planet in the ranks, not to mention that the small celestial bodies discovered later are much smaller than Pluto, how can they be called the 10th largest planet. What is the lower limit of the mass of the big planet, if there is a clear standard, there will be no competition for the 10th planet, I hope the experts will give a reasonable reason, thank you.

Analysis: I'm not an expert, but the information I've seen says that it is defined by the volume of the largest asteroid The largest asteroid (Ceres) is 735km in diameter, (one says it is more than 1000km) If it is larger than this volume and has its own independent orbit, it is generally a large planet The mass of not less than the moon is not the standard, because the moon is the third largest moon in the solar system, Mu Ming and Titan are both larger than the moon, and Pluto is smaller than the moon!!

Ninth place, Mercury, Mercury is the smallest of the eight planets, and according to common sense, it is also the least massive, and Mercury has a mass about twice that of Earth.

The eighth talk about filial piety, Mars, Mars is also very small, the volume is only 1 7 of the earth, and the mass is about twice that of the earth.

Seventh, Venus, Venus and Earth are sister stars with a mass about twice that of Earth.

Sixth, Earth, it is the largest rocky planet in the solar system, it has 20 times the mass of Mercury, 9 times that of Mars, and twice that of Venus.

Fifth place, Uranus, Uranus is the second smallest and least massive gas planet, it has a mass about twice that of Earth.

Fourth, Uranus is the size of Neptune, but the mass is not as large as Neptune, and the mass of Neptune is about twice that of Earth.

In third place, Saturn, Saturn is the second largest planet in the solar system, second only to Jupiter in size, and about twice as massive as Earth.

The second place, Jupiter, is the largest planet in the solar system, about 1,320 times the volume of the Earth, and about twice the mass of the Earth.

The first place, the sun, it is the largest celestial body in the solar system, accounting for the total mass of the solar system, it is about 330,000 times the mass of the earth.

The masses are, in descending order: Jupiter, Saturn, Neptune, Uranus, Earth, Venus, Mars, Mercury.

The volume from largest to smallest is: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury.

The eight planets are the eight large planets of the solar system, according to the distance from the sun from near to far, they are Mercury ( ) Venus ( ) Earth ( ) Mars ( ) Jupiter ( ) Saturn ( ) Uranus ( ) Neptune ( ) Most of the eight planets have the same rotation direction as the direction of revolution. There are only two exceptions: Venus and Uranus.

Venus rotates in the opposite direction to its revolution.

Definition of planets: first, celestial bodies that must orbit stars; Second, 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 objects near this orbit. According to this division, there are only eight planets in the solar system: water, metal, earth, fire, wood, and earth, plus Uranus and Neptune.

In contrast to the concept of nine planets mentioned before 2006, Pluto was classified as a dwarf planet and removed from the list of nine 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. It must be a celestial body orbiting the star - Pluto coincides. The mass is large enough to rely on its gravitational pull to make the celestial body appear spherical, but Pluto has not been able to clear other objects in its orbit and is therefore downgraded to a dwarf planet.

Methods of memorization. The usual notation of the eight planets is: water, gold, earth, fire, wood, earth, heaven and sea. It's a little long, but it's easy to remember.

Planetary definition. Celestial bodies orbiting the Sun are divided into three categories: planets, dwarf planets, and small solar system bodies.

A planet is a celestial body that orbits the Sun and is massive enough. Such objects:

There is enough mass for the shape of itself to be a sphere;

Small celestial bodies capable of emptying adjacent orbits. There are eight celestial bodies that can become planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

On August 24, 2006, the International Astronomical Union redefined the term planets, excluding Pluto from the list of large planets for the first time and forming Pluto, Ceres, and Eris into a new classification: dwarf planets.

Dwarf planets do not need to purge small objects from their neighboring orbits, other objects that could become dwarf planets are Sedna, Erkus, and Tron. From 1930, when it was first discovered, until 2006, Pluto was considered the ninth planet in the solar system.

However, in the late 20th and early 21st centuries, many objects similar in size to Pluto were discovered in the solar system, especially Eris, which was more clearly pointed out to be larger than Pluto. The other celestial bodies orbiting the Sun belong to the small bodies of the solar system.

The planet with the smallest mass in bulk among the eight planets is Mercury.

Mercury is the innermost and smallest of the eight planets in the solar system, and it is also the closest planet to the Sun. Known as Chenxing in China, it has the largest orbital eccentricity of the eight planets. It orbits the Sun once every Earth day, and it also rotates three times per revolution.

Mercury has the smallest orbital inclination of any planet in the solar system. The perihelion of Mercury's orbit moves 43 arcseconds (arc seconds) more per century than Newtonian mechanics, a phenomenon that was not explained by Einstein's general theory of relativity until the 20th century.

Mercury is a terrestrial planet that, because it is so close to the Sun, only appears as a star in the early hours of the morning or as an evening star at dusk. Unless there is a solar eclipse, Mercury is usually invisible under the sun's rays.

Let's take a look, which of the eight planets is the largest and which is the smallest?

Of the eight planets, the most massive is Jupiter.

The eight planets are arranged in order of mass, from largest to smallest: Jupiter, Saturn, Neptune, Uranus, Earth, Venus, Mars, and Mercury.

The eight planets are the eight large planets of the solar system, according to the distance from the sun from near to far, they are Mercury ( ) Venus ( ) Earth ( ) Mars ( ) Jupiter ( ) Saturn ( ) Uranus ( ) Neptune ( ) Most of the eight planets have the same rotation direction as the direction of revolution. There are only two exceptions: Venus and Uranus.

Venus rotates in the opposite direction to its revolution.

Of the eight planets in the solar system, Jupiter is the most massive.

Jupiter is the largest and fastest rotating planet among the eight planets in the solar system, the fifth planet from the inside out. It is one-thousandth the mass of the Sun, but twice the mass of the other seven planets in the Solar System combined. Jupiter, Saturn, Uranus, and Neptune are all gas planets, so they are also called Jupiter-like planets (Jupiter and Saturn are collectively called giant planets).

On February 3, 2012, scientists reported the discovery of two new moons of Jupiter, bringing the total number of moons to 68.

Jupiter is a gas giant. Gas planets do not have a physical surface, and their density of gaseous matter increases with depth. What we see is usually the tip of the clouds in the atmosphere, with a slightly higher pressure than 1 atmosphere.

Jupiter is mainly composed of hydrogen and helium, it is made up of 86% hydrogen and 14% helium, and the central temperature is estimated to be as high as 30500.

Jupiter is mainly composed of hydrogen, followed by helium, which accounts for 25% of the total mass, and the core contains other heavier elements. Shape: Oblate spheroid due to its rapid rotation (with a slight but noticeable bulge near the equator).

The outer atmosphere is clearly divided into multiple zones according to latitude, and the margins where each zone is connected are prone to turbulence and storms. The most notable example is the Great Red Spot, which was first discovered with telescopes in the 17th century. Orbiting the planet is a weak system of planetary rings and a powerful magnetosphere.

Jupiter has at least 63 moons.