In the very early days, people believed that the Earth was the center of the universe, and it was not until Copernicus proposed the heliocentric theory in the 16th century that mankind gained a deeper understanding of the universe. With the development of science and technology, scientists found that the solar system is only a small existence in the vast universe.
Some scientists have found that the solar system is getting closer and closer to the center of the galaxy, and it can be said that the solar system is falling towards the black hole at the center of the galaxy, and even scientists have calculated the exact time of the fall.
Cosmic Abyss Black Hole
Stars have lifetimes, and stars age and shrink because the energy released by elemental fusion inside the star is no longer sufficient to keep balance with the external gravity.
In other words, the energy in the core of the star is not enough to support the weight of the star itself.
The initial stars generally have only hydrogen inside, and these hydrogen elements piled up inside the star will continue to collide and fusion reactions will occur, and the energy produced by the fusion reactions will then be in balance with the external gravity.
During the fusion reaction, helium, lithium, boron, etc. slowly appear inside the star. (The order in which the new elements are produced is the order of the periodic table of elements)
After a period of reaction, the iron content inside the star increases, and usually by this time the star is in an aging state. The iron is more stable and does not produce enough energy to maintain the balance of the stellar structure.
Stars in the universe will face destruction after aging, the core of the star will continue to shrink inward under the influence of its own gravity, and then trigger a big explosion. This explosion will create two different ends for the star, some stars will be blown to nothing, and some stars can be preserved in the core.
When the core of this star contracts to its limit, all the matter inside will become neutrons and the star will stop contracting. At this point the star is like an exceptionally dense star, and there is even less space left in the interior of the star.
The formation of a black hole is similar to the destruction of a star, except that the stars that can form black holes are usually very massive, and their massive mass keeps the contraction going, and the large number of neutrons that repel each other cannot stop the contraction of the star.
Under the enormous pressure, the neutrons inside the star are crushed into powder, and all that remains is the extremely dense matter, which is what we call a black hole.
The high mass makes the gravitational force of the black hole is also relatively large, the black hole near the material will be swallowed by it, the black hole is relatively far from some stars and material will be in the role of strong gravitational force from the black hole closer and closer.
The reason why scientists gave it the name "black hole" is because its gravitational force is so strong that it will even swallow the nearby light, which leads to the surface of the black hole is almost all black.
After research, scientists have found that black holes exist in most galaxies in the universe, including the Milky Way as we know it. The masses of black holes are usually extremely large, and can have between 99 million and 40 billion solar masses.
As we mentioned earlier, black holes have a very high gravitational force and usually swallow other objects, the way they grow is by accretion.
The difference between black holes and other celestial bodies is that scientists are unable to observe them with the naked eye, so the internal structure of black holes is still at the stage of speculation and exploration. The reason why black holes are "invisible" is because of the curved spacetime, which means that under the influence of a strong gravitational field, spacetime will also be curved.
When light reaches the vicinity of a black hole, it automatically deflects and disappears into the black hole and appears elsewhere such as on Earth. Some stars emit light that is refracted by the black hole to reach Earth, a phenomenon known as "gravitational lensing", which allows us to observe not only the star's appearance but also its surroundings from Earth.
Some scientists have speculated that perhaps the solar system will also keep moving closer to the center of the galaxy under the action of the galactic black hole, after all, the solar system has been revolving around the center of the galaxy.
The fall of the solar system
After proposing this hypothesis, scientists began to observe and study, and eventually scientists found that the solar system orbit the Milky Way for 1 week, the distance between the two will be reduced by 2000 light years.
This means that as soon as the solar system rotates another 130,000 revolutions around the center of the galaxy, the solar system will fall into the black hole at the center of the galaxy. It takes about 250 million years for the solar system to revolve around the center of the galaxy for 1 week, and after 32.5 trillion years, the galactic black hole will swallow up the solar system.
Of course the above data are only theoretical times, in fact the rotation speed of the solar system is constantly getting faster, which means that the actual time for the solar system to fall into the black hole will be shorter than expected.
But we don't need to worry too much, after all, the sun itself has a limited lifespan. According to scientists, the sun's life expectancy is only about 5 billion years, the sun's internal hydrogen fusion is decreasing, the sun's volume is growing, and will eventually become a "red supergiant".
The sun will emit intense light and the temperature on Earth will reach about 60 degrees Celsius, making it impossible for humans and other living things to survive on Earth. In contrast the solar system falls into a black hole is more distant from us.
The theory of the expansion of the universe
If it does come to 32 trillion years, is the solar system really going to become food for galactic black holes? The answer is unknown, because the universe has been in a state of infinite expansion.
Scientists have found that since the Big Bang, space has been expanding, and in this state galaxies are getting farther and farther apart.
If the expansion of the universe is faster than the speed of the solar system falling into the black hole, the solar system will never be swallowed by the black hole.
Experts in the theory of the expansion of the universe have used the example of blowing up balloons to vividly illustrate the theory of expansion of the universe, assuming that the universe is a balloon with spots on its surface, and these spots are the galaxies of the universe.
With the increase of gas inside the balloon, the balloon is expanding, which in turn will make the distance between the spots on the surface of the balloon more and more distant. Similarly, as the universe expands the distance between the solar system and the galaxy will also become more and more distant.
In addition to the expansion of the universe will make the black hole of the Milky Way swallow the solar system into a bubble, the black hole itself does not have the ability to swallow the solar system.
The solar system revolves around the Milky Way because the Milky Way is 2 trillion times more massive than the solar system, just as the other stars in the solar system revolve around the sun because the sun takes up 99% of the mass in the solar system.
If the black hole at the center of the galaxy wants to completely conquer the solar system, it needs to have a large mass itself, and it is clear that the silver-centered black hole does not currently meet this condition.
From both aspects, the hypothesis that the solar system falls into a silver-centered black hole is not valid.
Through the above description we can learn that the sun's life span is only about 5 billion years, even if the sun's life span becomes longer for some reasons, many years later the solar system may also fall into a black hole with a silver heart, when the human should where to go?
At present scientists have not found a second planet in the solar system suitable for human habitation, as for other galaxies there is still an unknown.
The current level of technology is still unable to let space probes fly out of the solar system. It is hoped that someday in the future, mankind can invent a light-speed spacecraft so that rushing out of the solar system is no longer a hypothesis.
The universe is vast, and human beings and the earth are just a drop in the ocean in the universe. Only by keeping the fear of nature forever can human beings develop stably in the long run.