After the sun stops nuclear fusion, how long will it take for humans to perceive it? Scientists: tens of thousands of years

Sunshine, water, and oxygen together constitute the three major elements of life on earth. These three complement each other and are indispensable. If there is no sunlight, the earth cannot heat itself, and the existence of organisms will become a major problem.

According to scientists' budgets and estimates, the current state of the sun is just in its prime, so there are still 5 billion years of life, so there is no need for human beings to worry about the problem that the sun will go out.

So if the sun does go out, how long will it take for the last ray of sunlight on Earth to disappear?

How long does it take for humans to perceive after the sun goes out? 8 minutes? 10,000 years to be exact

The distance between the sun and the earth is about 150 million kilometers. If you look at the speed of light in a vacuum, after the sun goes out, the last ray of sunlight on the earth will disappear in 8 minutes.

However, the sun is not actually burning, so space is a vacuum environment. Even if there is really thin oxygen, there is no way to ignite the sun, and one sun is equivalent to 1.3 million earths, even if there are 1.3 million earths on the earth. Oxygen is exhausted, and a fireball with the mass of the sun is impossible to exist.

The reason why the sun glows and heats up is not because of burning, but mainly because the sun contains a large number of hydrogen atoms and helium atoms. According to calculations by researchers, the energy released by the interaction of the two atoms is equivalent to the simultaneous explosion of 1.8 billion nuclear weapons. So even if the sun stops reacting, the temperature and light of the sun will not disappear immediately. The whole process is quite slow, and it will take about 10,000 years to completely cool down.

The internal trend of the sun is that there is a very deadly radiation, that is, gamma rays. If the human body is directly irradiated by extra code rays, it will directly affect the internal structure. All people who have been irradiated by gamma rays will eventually suffer from cancer , and there is no cure.

If the sun destroys the internal gamma rays, it will be released, and the brightness will directly surpass the sun, and will be directly transmitted to the earth, causing irreversible damage to all living things on the earth. Because the sun itself contains huge energy, even if the sun stops emitting light and heat immediately, the human beings on the earth will not have any obvious changes.