How many are the Milky Way, how big is the Milky Way What is the Milky Way

Give so many points, I'll also join in the fun. The landlord's question is of little practical significance, referring to the upstairs Du Kang and nostalgia. Bigger than China is the world, bigger than the world is the Earth-Moon system, larger than the Earth-Moon System is the Solar System, larger than the Solar System is the Milky Way, larger than the Milky Way is the total galaxy, and there is no definition of a universe larger than the total galaxy.

There are infinite Milky Ways in the universe.

Just say "galaxy", there is only one.

Now, some scientists say that the Milky Way in the universe is also finite.

How big is the Milky Way?

The galaxy that is defined as the Milky Way is the galaxy where our sun is located, and this is the only one. However, the landlord's question is what to ask, and I didn't understand it.

1. The Milky Way (themilkyway or galaxy) is the star system in which the solar system is located, including 120 billion stars and a large number of star clusters, nebulae, as well as various types of interstellar gas and interstellar dust. It has a diameter of about 100,000 light-years, a center thickness of about 12,000 light-years, and a total mass of 140 billion times the mass of the Sun. The Milky Way is a spiral galaxy with a spiral structure, i.e., with a galactic core and two spiral arms, which are 4,500 light-years apart.

The Sun is located on the Orion Arm, an arm of the Milky Way, at a distance of about 26,000 light-years from the center of the Milky Way.

2. The English name of the Milky Way is themilkywaygalaxy or themilkywaysystem. The Milky Way looks like a large disk with a slightly bulging center, and the entire disk is about 100,000 light-years in diameter, and the solar system is located.

3. The Milky Way (19 photos) is about 10,000 light-years from the center of the Milky Way. The bulging place is the silver heart is a star-dense area, so it looks white and boundless. The Milky Way looks like a spiral from above, with four spiral arms extending evenly and symmetrically from the center of the Milky Way.

The center of the Milky Way and the 4 spiral arms are places where stars are concentrated. (There are 4 large spiral arms, but recent studies have shown that there are only two main spiral arms, and the other two are not fully developed) has 946080000000000000000000000000000000000000000000000000000000000000000000000000000000000 The thickest part of the middle disturbance is about 12,000 light years.

The Sun is located on an arm called the Orion Arm, about 10,000 light-years from the center of the Milky Way, and rotates counterclockwise (it takes about 100 million years for the Sun to rotate around the galactic center). The discovery of the Milky Way has been a long process. After the invention of the telescope, Galileo first used the telescope to observe the Milky Way and found that the Milky Way was made up of stars.

And then, TWright, IImmanuel Kant, Lang Zhi Li Hengbo and others believe that the Milky Way and all the stars may be combined into a huge star system.

The Milky Way is about 100,000 light-years in diameter, equivalent to 946,080,000,000 kilometers.

The thickest part of the middle of the Milky Way is about 3000 6500 light years. The Milky Way is the slag of the barred spiral galaxy where the solar system is located, with an elliptical disk shape and a huge disk structure, and the latest research shows that the Milky Way has four well-defined and fairly symmetrical spiral arms, which are 4,500 light-years apart. The number of stars in the Milky Way is between 100 billion and 400 billion.

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. Most of the Milky Way** regions are old stars (mainly white dwarfs), and the outer regions are mostly nascent and young stars. There are more than a dozen satellite galaxies scattered around an area of hundreds of thousands of light-years, and the Milky Way grows by slowly devouring the surrounding dwarf galaxies.

The Silver Heart of the Milky Way

The geometric center of the Milky Way is the intersection of the Milky Way's axis of rotation and the galactic plane. It is a bright spherical protrusion in the center of the galaxy, about 20,000 light-years in diameter and 10,000 light-years thick. This region is made up of a high density of stars, mainly red stars that are about 10 billion years old.

Evidence suggests that there is a huge black hole in the central region. Astronomers have observed that there are as many as 42 million stars in the space of the Milky Way's most center, which is one parsec (light-year) apart from each other, or as many as 10,000 stars per cubic light-year, which is 72 million times higher than the density of stars near the solar system.

In addition to being a geometric point, the silver heart also refers to the central region of the Milky Way. The silver heart is in the direction of Sagittarius, and the coordinates of the 1950 epoch are: right ascension 17°42 29 declination -28°59 18.

The sun is about 25,000 28,000ly () from the silver heart.

The above content refers to Encyclopedia - Milky Way.