Introduction to the nine planets of the Milky Way???

The 10 planets of the Milky Way: UY in Shield, VY Canis Major, Heart Major, Betelgeuse.

4. Betelgeuse. Seventh, Bisu.

5. Arcturus, North River.

3. Sirius, the Sun.

1. The shield carries the hole seat UY

It is a red supergiant located in the constellation Shield, with a radius of 1708 times that of the Sun and a volume of about 4.5 billion times that of the Sun, making it the largest star known to mankind. Located about 1.2 billion kilometers from Earth, the constellation Uy is ranked first not only in the list of the top ten stars in the Milky Way, but also in the entire universe.

2. Canis Major VY

VY Canis Major is a red supergiant located in the constellation Canis Major, it is 3820 light-years away from the Earth, with an average mass of 17 times that of the Sun, a radius of about 1420 times the radius of the Sun, and a volume of about 100 million times that of the Sun.

3. Heart star.

Antares, the main star of the constellation Scorpio, has a mass of about 883-1200 times that of the Sun, and a volume of about 100 million times that of the Sun. Among all the stars in the Milky Way, the Heart Star is undoubtedly a very large and well-known existence.

4. Betelgeuse.

Orionis is a red supergiant star in the constellation Orion, with a mass twice that of the Sun, a radius of about 887-955 times that of the Sun, and a volume of about 100 million times that of the Sun.

5. Betelgeuse.

Betelgeuse, also known as Orion, is about 863 light-years away from Earth, with a mass twice that of the Sun, a radius of about 77 times that of the Sun, and a volume of about 456533 times that of the Sun. Of all the stars in the Milky Way, Betelgeuse is also very large.

6. Aldebaran.

Aldebaran, also known as Taurus, is 68 light-years away from Earth, with a mass twice that of the Sun, a radius of about 38 times that of the Sun, and a volume of about 54,872 times that of the Sun. In the list of the top ten stars in the Milky Way, it is ranked sixth, but there are also larger ones.

7. Arcturus.

Arcturus is the main star of the constellation Pasture, which is light-years away from Earth, has a mass times that of the Sun, a radius of about 21 times that of the Sun, and a volume of about 9,261 times that of the Sun.

8, Beihe III.

In the list of the top ten stars in the Milky Way, it is naturally indispensable Beihe San, also known as the Gemini star, which is light years away from the Earth, has a mass that is times that of the Sun, a radius that is twice that of the Sun, and a volume that is 681 times that of the Sun.

9. Sirius.

Sirius, also known as Canis Major, is the brightest star in the whole day except the Sun, located light-years from Earth, with a mass of about twice that of the Sun, a radius of about twice that of the Sun, and a volume of about 5 times that of the Sun.

10. The sun.

When it comes to the top ten stars in the Milky Way, the sun is indispensable, although there are many bigger than the sun, but it is familiar with us after all. It is understood that the diameter of the sun is about 1,392,000 kilometers, which is equivalent to 109 times the diameter of the earth, and the volume is about 1.3 million times that of the earth.

There are more than 150 billion planets in the Milky Way.

So far, there are no more than 2,000 exoplanets observed by human beings, because the planets do not emit light, so it is difficult to observe, so it is also difficult to ** how many planets there are in the Milky Way, but it is impossible for all stars to have eight planets like our solar system, and there are many dwarf planets and asteroids, and in some of the star systems that have been observed, many of them are even without planets.

The introduction to the planets is:

1. Venus. Venus is very similar to our Earth in mass, volume, density, first of all, the radius of Venus is about 6000 kilometers (the radius of the Earth is 6371 kilometers), and the mass of Venus is about 500 billion billion kilograms (equivalent to 85% of the mass of the Earth), so the average density of Venus is 5200 kilograms per cubic meter (the average density of the Earth is 5500).

2. Earth. This is a planet where humans live, and the attributes will appear in the introduction of other planets, so I won't introduce them much.

3. Mars. Mars has a radius of 3,400 kilometers and a mass of 11% of the Earth, although it is not as large as the Earth in terms of volume and mass, but Mars has had the Earth's current climate and environment for billions of years, and perhaps there was life on Mars at that time.

4. Jupiter. Jupiter is the largest of the eight planets, and in terms of volume, it takes 1,400 Earths to fill a Jupiter, and Jupiter's mass is twice the mass of the other seven planets combined (but still much smaller than the Sun, only one-thousandth the mass of the Sun).

5. Saturn. Saturn has a mass of 95 times the mass and a radius of more than 9 times that of the Earth, and its rotation is the same as that of Jupiter, which is also a poor rotation. In fact, the rings of Saturn are composed of "ice cubes", and the volume of these ice cubes is not large, basically between millimeters and meters, and the thickness of Saturn's rings is only a few tens of meters, but its distribution range is quite wide, with a diameter of 200,000 kilometers.

There are about 300 billion planets in the Milky Way.

Astronomers believe that the Milky Way galaxy has about 93 stars with planetary systems, or 280 billion stars. The Milky Way galaxy is composed from the inside to the outside, including the galactic heart, the galactic core, the galactic disk, the galactic halo, and the galactic crown.

Ninety percent of the detectable matter in the Milky Way is within the range of the silver disk.

The shape of the silver disc is like a thin lens, distributed around the silver core in an axisymmetric form, and its center thickness is about 10,000 light years, but this is the thickness of the slightly raised nuclear sphere, and the thickness of the silver disk itself is only 2,000 light years, and the diameter is nearly 160,000 light years, which is very thin in general.

Modern observations

At the beginning of the 20th century, the Mount Wilson Observatory in the United States built the world's largest aperture meter astronomical telescope at that time. Astronomers refer to the star system with the Milky Way as the apparent phenomenon the Milky Way. Kaptan used the method of statistical parallax to determine the average distance of stars, combined with star counting, to arrive at a model of the Milky Way.

In this model, the Sun is in the center, and the Milky Way is in the shape of a disk, 8,000 parsecs in diameter and 2,000 parsecs thick. h.Shapley used the circumferential relationship of Cepheid variable stars to determine the distance of globular clusters, and studied the structure and size of the Milky Way from the distribution of globular clusters.

The model he proposed was that the Milky Way was a lenticular star system with the Sun not at its center.

Shapley calculates that the Milky Way is 80 kiloparsecs in diameter and the Sun is 20 kiloparsecs from the galactic center, which is too large because Shapley does not take into account interstellar extinction when calculating distances.

There are about 40 billion planets in the Milky Way. Our galaxy is home to about 40 billion planets. And the eight planets we know are Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, and Mercury.

Overview of the Milky WayMost of the stars in the Milky Way are concentrated in an oblate sphere of space, which is shaped like a discus. The protruding part of the oblate sphere in the middle is called the nuclear sphere, and the radius is about 7,000 light-years. The middle part of the nuclear ball is called the silver core, and the surrounding area is called the silver plate.

Outside the galactic disk there is a larger spherical region, where there are fewer stars and less dense, known as the galactic halo, with a diameter of 70,000 light-years.

The Milky Way is the star system in which the solar system is located, including 1500 to 400 billion stars and a large number of nebulae, as well as various types of interstellar gas and interstellar dust, black holes, and its total visible mass is 210 billion times the mass of the Sun.

The number of planets in the Milky Way is smaller than that of stars, while the number of stars in the Milky Way is between 100 billion and 400 billion.

Analysis: Because most scientists believe that the number of planets in the Milky Way is not so large, so far, there are no more than 2,000 exoplanets observed by humans, because the planets do not emit light, so it is difficult to observe, so it is also difficult to ** how many planets are in the Milky Way.

But it is impossible for all stars to have eight planets like our solar system, and there are many dwarf planets and asteroids, and in some of the star systems that have been observed, many of them are even non-planetary.

Companion galaxies of the Milky Way:

The Milky Way has two companion galaxies (satellite systems): the Large Magellanic Cloud and the Small Magellanic Cloud. The galaxies opposite the Milky Way are called extragalactic galaxies.

The Milky Way, the Andromeda Galaxy, and the Triangulum Galaxy are the three main galaxies in the Local Group of Galaxies, which in total has about 50 galaxies, and the Local Group is part of the Local Supercluster.

The Milky Way is surrounded by a number of dwarf galaxies in the local group of galaxies, the largest of which is the Large Magellanic Galaxy with a diameter of 10,000 light-years, and the smallest is the Carina dwarf galaxy. Other Milky Way systems orbit the Milky Herculid, with the closest being the Canis Major dwarf galaxy, followed by the Sagittarius dwarf galaxy, the Ursa Minor dwarf galaxy, the Euffle dwarf galaxy, the Sextant dwarf galaxy, the Celestial Furnace dwarf galaxy, and the Leo i dwarf galaxy.

See also terms for: companion galaxies, extragalactic galaxies, galaxy clusters, superclusters.

The 10 planets of the Milky Way are: UY in Shield, VY Canis Major, Heart Major, and Betelgeuse.

4. Betelgeuse. Seventh, Bisu.

5. Arcturus, North River.

3. Sirius, the Sun.

1. Shield Seat UY

Uy Shieldis belongs to the constellation Shield, belongs to the red supergiant, can be ranked first among the stars in the Milky Way, the radius is more than 1,700 times larger than the Sun, and the volume is more than 4 billion times that of the Sun.

2. Canis Major VY

Canis Major VY belongs to the constellation Canis Major, belongs to the red supergiant, is relatively far from the earth, more than 3,800 light years, has a mass that is seventeen times the difference of the sun's stupid dust, and a radius more than 1,400 times that of the sun.

3. Heart star.

Antares is also known as Antares, which belongs to the constellation Scorpio, has a mass sixteen times that of the Sun and a volume of more than a billion times that of the Sun.

Fourth, Betelgeuse.

Betelgeuse belongs to the constellation Orion, a red supergiant, and a first-magnitude star in the constellation Orion, with a mass more than 11 times that of the Sun, a body belt volume of more than 700 million times that of the Sun, and a radius of more than 800 times that of the Sun.

5. Betelgeuse VII.

Betelgeuse and Betelgeuse have a very close relationship, also belong to the constellation Orion, and the distance from Earth is more than 800 light years. It is more than sixteen times more massive than the Sun, and in the entire solar system, Betelgeuse is famous.

6. Aldebaran.

Aldebaran belongs to the constellation Taurus, the distance from the Earth is 68 light years, the mass is more than 11 times that of the Sun, the volume is more than 50,000 times that of the Sun, the radius is 38 times that of the Sun, and there are larger than him in the solar system, but it has not yet been discovered.

7. Arcturus.

Arcturus belongs to the constellation Pastorius, is 36 light-years away from Earth, has a mass more than one of the Sun's brothers, has a radius of 21 times the Sun, and is more than 9,000 times larger than the Sun.

Eighth, North River Three.

The top ten stars in the Milky Way must have Beihe-3, which belongs to the constellation Gemini, with a distance of 33 light-years from the Earth, a mass more than 1 point times that of the Sun, a radius of about 9 times that of the Sun, and a volume of more than 600 times that of the Sun.

9. Sirius.

Sirius belongs to the constellation Canis Major, and the brightness of Sirius during the day is second only to the Sun, the distance between it and the Earth is 8.6 light-years, the radius is 1.7 times that of the Sun, and the volume is five times larger than that of the Sun.

10. The sun. The sun is the star we are most familiar with, and without it, it would be difficult for human beings to live, and the diameter of the sun is 1.39 million kilometers, more than 100 times the diameter of the earth, and the volume is more than 1.3 million times larger than the earth.