Are black holes real? What would happen if the black hole sucked the sun in one day? ! !

1. Black holes do exist. The first confirmed black hole is Cygnus X-1. The center of the Milky Way has also been confirmed to have a supermassive black hole with a mass of about 4 million times that of the sun.

2. The sun will not become a black hole. It is too small. After the hydrogen inside it is exhausted, it will further collapse under the influence of gravity and trigger a fusion reaction in which helium is polymerized into carbon. The energy released by this reaction will heat the sun's outer layers, causing it to expand into a red giant, at which point the Earth may also be swallowed by the sun. Finally, when the helium in the middle of the sun is also exhausted, because its mass is not enough to trigger further nuclear fusion, the core of the sun will become a white dwarf star about the size of the Earth, and gradually cool in the universe until it no longer Glowing, turning into an icy black dwarf star. When a star larger than the sun dies, its core presses electrons and protons together under strong gravity, turning it into a neutron star. There are two fates for a neutron star. One is to slowly cool down or slowly absorb the surrounding universe. The material continues to gain weight, and when it reaches a critical mass, it explodes into a Type 1-A supernova. When a star much larger than the sun dies, its core is compressed into an infinitesimal point, and its gravity is so great that even light cannot escape within a certain distance, that is, a black hole. The center of a black hole is called the singularity, and the critical distance beyond which light cannot escape is called the event horizon.

3. If there is a wandering black hole close to the sun, then people on earth may see the following scene:

a. First, when the black hole slowly approaches from space where matter is very thin In the process of the solar system, the particles ejected by the sun are captured by the gravity of the black hole, forming an accretion disk. As the material in the accretion disk falls toward the black hole, it gradually heats up and begins to glow, making the black hole visible;

b. When the black hole is close enough to the sun (assuming that the earth is lucky enough and has not been eaten by the black hole), the solar atmosphere is pulled away from the surface by the gravity of the black hole. At this time, a stream of fire from the surface of the sun can be seen with the naked eye spraying into the void. , injected into a hot, high-speed rotating disk. If you use X-ray detection, you may also see high-energy X-rays ejected from the direction of the accretion disk's rotation axis (if the earth is unfortunately on the axis of the accretion disk, then there is no need to observe, because everyone will be baked immediately)

c. If the black hole is too close to the sun, then everyone will see that the sun is severely deformed, stretched, torn into pieces, and turned into an accretion disk until it is completely swallowed by the black hole.

d. If the earth is swallowed by a black hole, no one can see the moment when it is finally swallowed by the event horizon, because long before that, regardless of the heating during the fall into the black hole, the earth and the earth Everything will be torn apart by the strong gravity difference and tidal action. The only question is to what extent the matter will be torn apart when it falls into the event horizon - molecules? atom? plasma? Or was even the atomic nucleus torn to pieces?

Finally, use four words to summarize the scene of the sun being sucked into a black hole: the end of the world!