Which constellation does the earth belong to?

What constellation is the earth in the universe? No one will tell the landlord which constellation the earth is, because the landlord's question is meaningless.

Let's talk about what a constellation is. When we observe the starry sky, we can't see the distance of the stars, so we imagine all the stars on a sphere with the same distance from us. This sphere is called the celestial sphere.

Constellations are artificially divided areas on the celestial sphere. The celestial bodies in a sky area belong to a constellation, so the constellation is only for the celestial sphere, and the celestial sphere is only for the celestial bodies in the sky. Observing from the earth, the earth is obviously not a celestial body in the sky, so it can't be said that it is in a constellation.

However, observation in other places can tell what constellation the earth is in. For example, today the earth sees the sun in Gemini, and correspondingly, the sun sees the earth in Ophiuchus. This will change with the change of observation position.

What is the relationship between the two constellations of the earth? What is the relationship between the Milky Way and the constellation? Which is bigger?

The relationship between the superior and the subordinate, of course, is the Milky Way.

The Milky Way is the galaxy to which the earth and the sun belong. It is named because the bright band whose main part is projected on the celestial sphere is called the Milky Way in China.

The Milky Way is a whirlpool, and four spiral arms extend evenly and symmetrically from the center of the Milky Way. The center of the Milky Way and the four spiral arms are places where stars are concentrated. From a distance, the Milky Way looks like a discus for exercise. The diameter of discus is 654.38+ million light years, which is equivalent to 1 100 million kilometers. The thickest part in the middle is about light years. The sun is located on a spiral arm called Orion arm, about 33,000 light years away from the center of the Milky Way.

The Milky Way is the star system where the solar system is located, including120 billion stars, a large number of star clusters and nebulae, and various types of interstellar gas and dust. Its total mass is 654.38+04 billion times that of the sun. Most stars in the Milky Way are concentrated in a oblate sphere, which is shaped like a discus. The protruding part in the middle of the oblate sphere is called the "nuclear sphere" with a radius of about 7000 light years. The center of the core ball is called "silver core" and the periphery is called "silver disk". There is a bigger sphere outside the silver disk, where there are fewer stars and less density. It is called "Silver Halo" with a diameter of 70,000 light years. The Milky Way is a spiral galaxy with a spiral structure, that is, it has a silver center and two spiral arms, which are 4500 light years apart. The rotation speed and period of each part of it are different because the distance from the silver center is different. The sun is about 23,000 light-years away from the galactic center and orbits it at a speed of 250km/s..

The relationship between the superior and the subordinate, of course, is the Milky Way.

The Milky Way is the galaxy to which the earth and the sun belong. It is named because the bright band whose main part is projected on the celestial sphere is called the Milky Way in China.

The Milky Way is a whirlpool, and four spiral arms extend evenly and symmetrically from the center of the Milky Way. The center of the Milky Way and the four spiral arms are places where stars are concentrated. From a distance, the Milky Way looks like a discus for exercise. The diameter of discus is 654.38+ million light years, which is equivalent to 1 100 million kilometers. The thickest part in the middle is about light years. The sun is located on a spiral arm called Orion arm, about 33,000 light years away from the center of the Milky Way.

The Milky Way is the star system where the solar system is located, including120 billion stars, a large number of star clusters and nebulae, and various types of interstellar gas and dust. Its total mass is 654.38+04 billion times that of the sun. Most stars in the Milky Way are concentrated in a oblate sphere, which is shaped like a discus. The protruding part in the middle of the oblate sphere is called the "nuclear sphere" with a radius of about 7000 light years. The center of the core ball is called "silver core" and the periphery is called "silver disk". There is a bigger sphere outside the silver disk, where there are fewer stars and less density. It is called "Silver Halo" with a diameter of 70,000 light years. The Milky Way is a spiral galaxy with a spiral structure, that is, it has a silver center and two spiral arms, which are 4500 light years apart. The rotation speed and period of each part of it are different because the distance from the silver center is different. The sun is about 23,000 light years away from the galactic center, and it orbits the galactic center at a speed of 250 km/s with a period of about 250 million years.

About a billion. At present, there will be no answer that is too different from this.

Planets are not galaxies, but stars. A star forms a galaxy with its planet, all celestial bodies and interstellar matter. Almost all galaxies have planets. There are many stars with planets. Not less than 10%, I seem to remember not less than 20%, maybe 30% or 50%. But it's far away and not easy to be found. People can only find Jupiter (thousands of times as many as the earth).

A star with planets within ten light years. But people hope to find planets with (higher) life. People suspect that there are planets with higher life on two stars 30 to 50 light-years away from us, so they send radio waves in that direction. (That is to say, it will take at least seventy years to get the result. )

It is just made up of some stars.

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Bullshit! The constellations we see are all made up of many galaxies. The stars in the same constellation are not necessarily in the same galaxy, but when we look at the earth, they are just in the same direction! !

125.39. 138.*

I come from the other side of the galaxy. Do you want to find me?

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No, because the constellations are too far away to tell their relative distance with the naked eye. We don't know if it is in the Milky Way. . . You can ask me if you don't know yet ~ ~ ~

The Milky Way is the galaxy where the solar system is located. It is the Andromeda galaxy, and it is in the same cluster as this galaxy. > & gt

Of the twelve constellations, which is the closest constellation to the earth and how many light years are there? What is the farthest constellation and how many light years? Constellation is a specific area on the celestial sphere seen by human naked eyes. 1930, the International Astronomical Association drew precise boundaries for 88 constellations. Therefore, the celestial bodies in the same constellation may not have any connection, or they may be far apart, just saying that from the perspective of the earth, their projections on the celestial sphere all fall in the same designated area. So you can't answer this question.

Which constellation does Polaris belong to? Polaris is now very close to the north pole of the earth in the sky. Therefore, it always seems to be in the northern sky. It is because of its important position that it is famous. In fact, according to the brightness, it is just an ordinary second-class star, belonging to the "younger generation." It is more than 300 light years away from us. Polaris belongs to the brightest star in Ursa minor, also known as Alpha in Ursa minor. China called it "Gouchenyi" or "Beichen" in ancient times. On the constellation diagram, it is on the tip of the bear's tail.

Speaking of which, maybe you have to ask: Will Alpha Bear always enjoy the title of Polaris? Or, does the north pole of the earth's rotation axis always point to this star? First of all, it should be pointed out that the rotation axis of the earth is also slowly swinging periodically. Therefore, the position of the sky referred to by the north pole of the earth's rotation axis naturally changed. It can be seen that the "throne" of Polaris also has the possibility of taking turns to sit in the village. Astronomers have made it clear for a long time that 4800 years ago, Polaris was not the present alpha star of Ursa minor, but the alpha star of Draco called right pivot in ancient China. At that time, the right fulcrum won the honor of Polaris. By the year 1000, that is, the early years of the Northern Song Dynasty in China, the sky referred to by the North Pole of the Earth was 6 degrees away from the current Polaris, that is, the Alpha Star of the constellation Ursa minor. It can be seen that it was far from Polaris. At present, the north pole of the earth's rotation axis points to the sky, and the angular distance from Alpha Ursa minor is only about 1 degree. At present, the sky pointing to the north pole of the earth's rotation axis is approaching Ursa minor at the speed of 15 arc seconds per year. By AD 2 100, the angular distance between the sky indicated by the north pole of the earth's rotation axis and the alpha star Ursa minor was the smallest, only about 28 minutes. It seems that its "status" reached the peak of Polaris at this time. In the future, the sky pointing to the north pole of the earth's rotation axis will gradually move away from Ursa minor. By about 4000 AD, Cepheus Gamma will become the North Star. By 14000, Vega, the alpha star of Lyra, will gain the reputation of Polaris. At this time, people talked about the story of the Cowherd and the Weaver Girl. Vega's position as the throne of Polaris far exceeds that of Cowherd. The time for the earth's rotation axis to swing like this is about 26,000 years. This shows that everything is in motion, stillness is only temporary and relative, and the change of motion is eternal.