Lead
Under the night sky, people can see a starry sky, but this is only an insignificant corner of the Milky Way, the center of the galaxy is as bright as day, all this is a small part of the starry sky that people see in the night sky.
The Milky Way is a huge group of galaxies, but it is only one galaxy in itself in which the solar system is located.
The solar system is located at the edge of the Milky Way, and although there are already so many stars in the night sky, if the solar system is located at the edge of the Milky Way, then the stars seen in the dark night sky are only the tip of the Milky Way.
And that's not even counting the shining stars in the heart of the Milky Way and the many not-so-beautiful sights in the night sky.
Scientists look through a telescope at the heart of the galaxy and observe a dazzling scene in the center of the galaxy, which also contains a huge black hole of the size of the universe.
What does the Milky Way look like?
In which spiral arm of the Milky Way is the solar system located?
What about the heart of the galaxy?
1. The Milky Way is in the shape of a vortex.
The Milky Way, also known as the galactic heart, is the closest galaxy to the solar system, the Milky Way is also the parent galaxy of the solar system, most of the stars are galaxies at a distance from the sun, so the Milky Way is very important to the galaxy where the solar system is located.
Scientists have been observing the Milky Way and have discovered that the Milky Way has a huge vortex structure.
The solar system is at the edge of the Milky Way, which is why the night sky is so dark, and this is how the dazzling center of the Milky Way is formed.
The Milky Way has many spiral arms, centered on the silver core, spreading out in all directions.
The Perseus spiral arm is the first spiral arm discovered in the Milky Way, which is derived from the positioning of the starry sky in the constellation Perseus in the night sky.
Later, more and more spiral arms were discovered, and the spiral arms of the Milky Way were expanded to four, and the solar system was located on the Perseus spiral arms.
The constellation Perseus in the night sky is a very beautiful constellation, it is radiant, it is called Perseus, and the stars on the constellation Perseus are also scattered in the night sky of the Milky Way, which is a very distinctive spiral arm.
In the center is the galactic center, which is the center of the Milky Way, a huge stellar dense area, figuratively known as the galactic core.
Scientists have observed the Milky Way in a vortex and found that the solar system and other stars move in such a vortex.
The solar system and other stars are very small, and if you look at them directly, they are a very strange vortex for the whole galaxy, because the number of the solar system and other stars is very small, so it is very difficult to spot such a vortex when you look at it.
But despite the small number, the solar system, like the stars, revolves according to the gravitational pull of the galactic center.
The Milky Way is called a spiral galaxy because of its circular orbit.
Due to the small number of stars, scientists can only explore the spiral Milky Way by looking at the trajectories of the stars.
Scientists have found that the speed of stars varies depending on the spiral arms, with the fastest accelerating being those near the silver and the slowest accelerating being those farther away from the silver core.
Second, the dazzling scene of the silver heart.
The silver nucleus is very close to the galactic center, and the star density is very high, just like the stars that can be seen exploding at the galactic center in the night sky, these are the stars in the galactic core region.
Not only are the silver nuclei densely populated, the stars are very old, and these stars are very bright stars.
If someone in reality were able to reach the Silver Core, they would be illuminated by the extremely bright stars in the Silver Core and close their eyes.
But the silver core is also a very dangerous place, the star that explodes in the night sky is the star in the silver core, and the silver core has a supermassive black hole - Sagittarius A*.
Sagittarius A* is a supermassive black hole in the Milky Way, the most dazzling place in the night sky where the silver heart shines, and is a supermassive black hole formed by stars in the silver core, which is 4 million times the size of the Sun.
The silver core has not been observed but has been guessed until scientists have discovered that the silver core is surrounded by huge stars like the moon around the earth's trajectory, but these stars are very young and very massive, and it was guessed that there is a more huge celestial body around it - a black hole, so the silver core was detected.
Black holes cannot be directly detected, so scientists have observed the stars in the silver nucleus and found that the stars in the silver nucleus move very fast, which requires a huge object to control their movement.
So scientists calculated that there is a cosmic-level celestial body in the silver nucleus through the principle of motion and revolution between objects, which is Sagittarius A, a black hole formed from the accumulation of stars.
Sagittarius A in the night sky cannot be observed intuitively, unless it is observed by more advanced telescopes, which may be able to observe it in detail.
But Sagittarius A* is the brightest in the night sky, visible even from far away on Earth, and the brightest place in the night sky is it, with the trails of stars in the silver nucleus flashing like meteors under its guidance.
There is also a speculation that the stars that exploded in the night sky, these bursting stars were caused by the depletion of fuel in the core of the central star, and with the collapse of the core, a very strong gravitational pull was generated, and finally developed into a supermassive black hole, and the ultra-high gravitational attraction attracted the objects around it to it, but due to the very high speed, friction occurred, and dazzling sparks were emitted, and finally it was called a blasting star.
These blasting stars include many of the blasting stars in the silver core, so many stars are good-looking, but the silver core is not suitable for the existence of life, so why?
3. The silver nucleus is not suitable for life.
Because the number of stars exploded in the silver core is very large, there will be a stellar explosion almost every day, and the explosion of stars will produce huge rays, destroying the atmosphere of the surrounding universe, the universe without an atmosphere can not shade the rays produced in the universe, and the rays produced by the stellar explosion in the silver core will threaten life in the universe, so the silver core is not suitable for life.
But the presence of the silver core is also very important, supporting the life system of the entire galaxy, and its gravitational pull allows the stars in the galaxy to rotate.
In addition, the stars in the silver nucleus are also very distinctive, because most of the stars in the explosion are red giants, so most of the stars in the silver nucleus are red giants, these red giants will develop into a ring structure composed of layers of stars at the end of the stage, such a structure is very distinctive, which is also the reason why you can see the "willow leaf-shaped" stars in the night sky, there are not only swirling Milky Way in the night sky, but also stars with various characteristics.
There are a lot of stars in the center of the Milky Way, and there are many that have not been observed, because the silver core is too dazzling, so it is difficult to observe the stars in the silver core in the night sky, but scientists have studied that most of the stars in the silver core are red giants, and most of these red giants are ancient stars.
About hundreds of billions of years ago, the ancient red giants in the silver nucleus produced a supernova explosion, which caused the core to collapse due to the depletion of fuel in the star's core, forming a supermassive black hole, which is called Sagittarius A*.
These supernovae are not one or two stars, and they are still evolving, if one day the black hole in the silver core produces gravitational waves, then there are stars in the silver core that produce supernovae, which is why the silver core is observed to have a burst of stars.
epilogue
Sagittarius A* is very dazzling in the night sky, it is a black hole in the silver core, which cannot be directly observed, but it has a huge gravitational effect, so it has been discovered by scientists.
Stars that explode in the silver core are also often observed by scientists, so they are very bright when observing the night sky.