How many constellations does the Milky Way have, how many cantilevers are there, which cantilever is

Constellations refer to a group of stars in the sky projected on the celestial sphere at similar positions, which do not belong to the Milky Way, so there are several galaxies in the Milky Way that are misstated, and the International Astronomical Union accurately divides the whole day into 88 constellations.

The Milky Way has four spiral arms, namely the Orion spiral arm, the Perseus spiral arm, the Sagittarius spiral arm, and the 3,000 parsec arm.

The Sun is located at a distance of about 27,700 light-years from the center of the Milky Way, on the inside of the spiral arm of the constellation Orion.

When it comes to studying the spiral arms of the Milky Way, optical methods are very limited. Knowledge about the spiral arms of the Milky Way is mainly about radio observations. In the vicinity of the Sun, radio observations detected three spiral arms, namely the Perseus, Orion, and Sagittarius.

The Sun is close to the inside of Orion's spiral arm. In the seventies of the twentieth century, by probing the distribution of carbon monoxide molecules in the Milky Way, a fourth spiral arm was discovered, which spanned the constellations Fox and Cygnus. It is a spiral arm 4,000 parsecs away from the center of the galaxy, called a 3,000 parsec arm, that is expanding outward at a speed of about 50 kilometers per second.

Known: The spiral arms are where gas, dust, and young stars are concentrated.

The four spiral arms are the centaur arms. Perseus Arm. Orion Arm.

Swan Arm. The position of the solar system moves slowly in the Milky Way and is not fixed in one position. For example, when the dinosaurs became extinct, the solar system was not on the spiral arm.

It's between the swivel arm and the swivel arm. Now the solar system is on Orion's arm!

With 88 constellations and 4 spiral arms, the solar system is on the spiral arms of Orion.

In 1922, the General Assembly of the International Astronomical Union decided to divide the sky into 88 constellations, the names of which were basically based on historical names. In 1928, the International Astronomical Union officially announced the names of 88 constellations. These 88 constellations are divided into 3 celestial regions, 29 in the Northern Hemisphere, 47 in the Southern Hemisphere, and 12 near the ecliptic.

And the constellations we usually talk about are the 12 constellations on the zodiac. Each of them has some myths and legends about itself.

But for the universe, human beings have only observed the Milky Way, and there are too many extragalactic galaxies.

The Solar System is located on the Orion Arm of the Milky Way, a small arm between the Perseus Arm and the Centaur Arm, which orbits around the galactic center at a speed of about 220 kilometers per second, and it takes about 100 million years to make a circle.

Looking at the appearance of the Milky Way, you will also find 4 spiral arms, which are the shield-centaur arm, the bottom-centaur arm, the Perseus arm, and the outer edge arm. The spiral arms contain many young stars and nebulae, so the spiral arms appear blue with red nebulae dotted with them.

The center of the Milky Way is called the galactic center, all the stars will revolve around the galactic center, there is a huge black hole there, in the northern hemisphere summer night sky, the brightest part of the galactic galaxy is the direction of the galactic center, the solar system is about 10,000 light-years away from the galactic center, we are not in the center of the galactic galaxy, but far away from the galactic center.

From a galactic perspective:

The Sun is just an ordinary yellow dwarf star in the cantilever of Orion, with a diameter of only 1.39 million kilometers, but the entire solar system is much wider than we think, and most people have always thought that the heliopause of the sun is the "edge of the solar system".

Because in this range, it is the boundary where the solar wind meets the interstellar medium and stagnates, when in fact the heliopause is not the edge of the Sun. At present, astronomers generally believe that the boundaries of the solar system are bounded by the gravitational constraints of the sun, that is, the Oort cloud range.

Galaxy. It is a spiral galaxy (a barred spiral galaxy to be exact), with four rotating "arms" extending from the inside out: the Sagittarius spiral arm, the Orion spiral arm, and the Perseus constellation.

Spiral arm and 3,000 parsec arm. Each "arm" is made up of countless stars and nebulae. The solar system in which we live.

Inside the Orion spiral arm.

Our Sun is located between the Milky Way Orion Arm or Orion Arm, which is a small spiral arm between two other spiral arms, between the Milky Way Centaur Arm and the Perseus Arm, but closer to the Perseus Arm.

6 articles. The Milky Way consists of four large and two small spiral arms. Solar system.

Nestled on the shorter spiral arm of Orion, it is located in the constellation Perseus.

Between the spiral arm and the Sagittarius spiral arm. The spiral arm is the cradle of the birth of new stars in the Milky Way.

In fact, about ten new stars are formed in the Milky Way every year, and at least one star ages every hundred years. Newborn stars appear right on the spiral arms of the Milky Way.

The Sun is located on one of the spiral arms, the inner side of the Orion spiral arm, from the center of the Milky Way.

Approximately 10,000 light-years away. The four spiral arms revolve around the Milky Way, which has a rotation period of about 100 million years, which means that the solar system in which the Earth is located is revolving around the center of the Milky Way at a speed of about 250 kilometers per second.

In the hundreds of thousands of light-years around the Milky Way, there are more than a dozen satellite galaxies.

The larger of these is the Large Magellanic Cloud.

and the Magellanic Nebula.

The Milky Way we see is the side Milky Way disk, and we are on the spiral arm of Orion, and we can see most of the Milky Way disk. If we were near the center, we would see more structures. Because the center of the Milky Way is blocked, the structure behind it is difficult to see.

<> is mainly the silver disk and the silver core, the solar system is located in the Orion arm of the Milky Way, and the spiral arm is located in the plane of the silver plate, that is, we often call the plane of the Milky Way, at home or abroad, in the summer night sky we can see a faint light across the sky, this is the silver plate, there are all kinds of stars in the silver plate, including main-sequence stars, stars, stars. and various variable celestial bodies, as well as a large number of interstellar matter, such as ionized hydrogen, hydrogen molecules, etc., as well as a large number of interstellar dust, these interstellar dust has a strong extinction function in the visible light band, mainly distributed in the plane of the Milky Way, which is the main reason why we cannot see the silver nucleus through the visible light band.

In the starry sky, the silver core is located in the direction of Sagittarius, which is actually very dazzling, because there are a large number of old stars more than 10 billion years old here, and the area where a large number of stars gather is very bright, but due to the extinction of interstellar dust, we can not perceive it, but we can observe the silver core through infrared and radio bands. In fact, when we look up at the night sky, almost all the stars we can see with the naked eye are stars of the Milky Way.

The Milky Way is a bar spiral galaxy with a diameter of 160,000 light-years. The Milky Way has four spiral arms. Centaur Arm, Orion Arm, Ionic Arm, and 3000 Pascal Arm.

According to the density wave theory, when these spiral arms sweep over the interstellar gas, the interstellar gas is compressed, resulting in the birth of a star, so the spiral arms are the cradle of stars.

The four continents, also known as the four continents, the four continents, and the four heavens, are the four continents in the Aral Sea around Mount Meru in Chinese Buddhism, which are Dongsheng Shenzhou; Xiniu Hezhou; South Ganbu Chau; Beiju Luzhou...

4, which are the centaur arm, the Orion arm, the Perseus arm, and the swan arm. The Sun is located on the inside of Orion's arm, see details for details.

The 4 are the Centaur Arm, the Orion Arm, the Perseus Arm, and the Swan Arm The sun is located on the inside of the Orion arm.