Lead
Galaxies are the basic units that make up the universe, and the extent is a group of stars, dust, and gas, which can only exist if they are given enough gravitational pull to these planets and matter.
Most of the matter in a galaxy is concentrated in the region at its center, which is usually one or more extremely large stars or a star that has stopped burning due to gravitational pull.
And these stars are like big magnets, attracting the surrounding stars, dust, and gas, and making them revolve around them.
There are about 200 billion known galaxies, and these galaxies are divided into 14 categories, and different types of galaxies have their own characteristics, which are determined by different compositions and modes of operation.
The galaxy model contains an extremely powerful substance that is beyond human reach, which prevents humans from delving further into the mysteries of the universe.
How big is the Milky Way, the second largest galaxy observed by astronomers?
How does the Milky Way compare to Alcuonus, which is known as the largest galaxy ever observed?
The vastness of the universe is immeasurable, and even the cognition of human beings has been subverted.
The structure of the Milky Way.
The Milky Way is a barred spiral galaxy, a galaxy of countless stars, just like any other galaxy.
And this galaxy has its own name, which is Sagittarius (Latin: Sagittarius).
But the name does not come from astronomers, but from the early Turkey based on the shape of the stars in galaxies.
The Milky Way appears in the night sky as a sinuous band of light, which is woven by the brilliance of a large number of stars.
Sagittarius, as a barred spiral galaxy, has a unique structural feature.
It is divided into a number of spiral arms, each of which has a large number of stars, the outermost spiral arm is called the "Orion arm", while the one near the center is called the "centaur arm", a name in honor of the ancient constellation Sagittarius.
Like other galaxies, the spiral arms of Sagittarius are constantly rotating and orbiting, and these movements are all around a supermassive black hole at its center, which is called "Sagittarius A".
Sagittarius A is an extremely large mass, about 100,000 light-years in diameter, like the entire Milky Way, and its gravity is so strong that the brightest stars in the Milky Way cannot escape its bondage.
In addition to the Centaur arm, there are many other spiral arms in the Milky Way that have different names and characteristics, the outermost of which is called the "Orion Arm", which is one of the richest parts of the galaxy because of the large number of stars and other materials that are concentrated in this spiral arm.
The spiral arm near the center is called the "centaur arm", a name in honor of the ancient horse constellation.
Although the spiral arm is a little sparser than the outer spiral arm, it contains a large number of young stars and interstellar material in the Milky Way.
In addition to these main spiral arms, there are a number of auxiliary spiral arms in the Milky Way, which are mostly smaller and sparsely distributed, but they are also an important part of the Milky Way's structure.
In conclusion, the Milky Way galaxy is like a vast vortex that exists in the universe in its unique way of rotating.
Scientists have calculated that the diameter of the Milky Way is between 100,000 and 200,000 light-years, and its thickness is between 3,000 and 12,000 light-years.
As a huge galaxy, the Milky Way contains a large number of stars, planets, white dwarfs, supernovae, black holes, stellar remnants and other celestial bodies, as well as a large amount of interstellar matter formed by gas and dust.
However, scientists currently believe that there are about 10 to 40 billion stars in the Milky Way, and the estimated mass of the Milky Way is 3 billion times the mass of the sun.
These stars are divided into three main components, namely the galactic disk, the galactic nucleus, and the galactic halo.
The galactic disk mainly contains most of the stars and is the densest part of the Milky Way.
The galactic nucleus is an extremely large substance, a supermassive black hole that can be said to be the engine of the Milky Way.
The galactic halo is the outermost part of the Milky Way, which contains some thin gas and dust.
The shape of the Milky Way resembles a swirling disque, which contains large amounts of gas and interstellar matter, and is where stars are born.
Andromeda and the Milky Way.
Both the Milky Way and the Andromeda Galaxy are types of barred spiral galaxies, and they share similar structures and characteristics with each other.
The Andromeda Galaxy, also known as M31, is a galaxy located about 2.2 million light-years from our Milky Way.
Like the Milky Way, the Andromeda Galaxy has its own spiral arm structure, which contains a large number of stars, dust, and gas.
At the center of the Andromeda Galaxy also contains a supermassive black hole, an extremely large mass of matter with extremely strong gravity.
Scientists believe that there is a gravitational interaction between the Andromeda Galaxy and the Milky Way, and this interaction causes the orbits of the two galaxies to gradually move closer together.
According to research, the Milky Way and the Andromeda Galaxy are now approaching each other at a speed of about 402,000 kilometers per hour.
This interaction is known as a galactic merger, and since both the Milky Way and the Andromeda Galaxy are barred spiral galaxies, the merger between them could lead to the creation of a large number of new stars in the collision.
In the next 3.75 billion years or so, the Andromeda Galaxy will collide with the Milky Way, which will be a very spectacular sight.
In this collision, the spiral arms of the two will intertwine, resulting in the formation of many new stars that will become new members of the Milky Way.
Eventually, the two galaxies will merge into a new galaxy, which will be a supermassive galaxy that will contain multiple supermassive black holes.
Although the Andromeda Galaxy is still far from the Milky Way, the distance between the two will gradually decrease over time.
In 3.75 billion years, this spectacular scene will be displayed in our skies.
Whether from Earth or other planets, we were able to see this spectacular astronomical phenomenon, and this is an opportunity not to be missed.
The largest known galaxy, Arcuonus.
In the vastness of the universe, galaxies are as brilliant as pearls, and among these galaxies, there is undoubtedly one galaxy that shines the brightest, and it is Arcuonius.
Before its discovery, astronomers thought the Milky Way was the largest galaxy, but now that Arcuonius has been discovered, it has been overturned when it turns out that it was 90 times the size of the Milky Way.
Today, the largest known galaxies have been compared, and in this galaxy race, Alcuonius won the title of the most galaxy over the stars.
The size of Arcuonius is staggering, with a diameter of 16.3 million light-years, which is 90 times the size of the Milky Way.
Such a sheer scale makes the Alcuonius galaxy unique in the universe and an unsurpassable existence.
Although there are a large number of small galaxies scattered in the outer layers of the Alcuonus system, at its center, there is a "core" that reaches a staggering 10 million light-years in diameter.
Millions of stars converge in this region, forming a dense and dazzling collection of celestial bodies.
Interstellar matter is extremely dense here, almost 100 times denser than the Milky Way.
Known as the "heart" of the galaxy due to its strong gravitational field and brilliance, this core region emits an amazing glow.
The discovery of the Alcuonius galaxy not only made mankind realize the vastness of the universe, but also challenged people's imagination.
However, the giant galaxies in this universe cannot be directly observed.
All that scientists know about Alcuonus comes from the meticulous observations of it by the Hubble telescope.
Although we can't touch the Alcuonius galaxy directly, the Hubble telescope transmits its information to us by observing the light emitted by the galaxies.
This information gives us a glimpse into the mysteries of the Alcuonius system, but it also makes humanity feel small.
Because the discovery of the Alcuonius galaxy in the observable universe is only the tip of the iceberg, there may be even larger galaxies in the infinite universe.
According to scientific speculation, the diameter of the observable universe has reached 93 billion light-years.
This number means that we can only see a part of the universe as far as we can observe, and explore its mysteries to the fullest extent.
The discovery of Alcuonius reorients the perception of the universe.
In the future, more galaxies may be discovered, and it is even possible to overturn all human knowledge of the universe.
epilogue
The universe is a wonderful and vast space, and although we know so little about it, it is still full of countless unknown possibilities.
The story of the Milky Way and the Alcuonius galaxy is just the tip of the iceberg.
The vastness and mystery of the universe are waiting for us to explore and discover more wonders.