If the sun goes out quietly, will humans still have hope of survival? Life will enter a countdown

If the sun quietly goes out, will humans still have hope of survival?

In this question, the word "quietly" is particularly important, because the sun, as a star, will not fail silently. At the end of its life, it will release huge amounts of energy to destroy the Earth's ecology. This process is called a "helium flash," and then its volume will expand rapidly, eventually engulfing the Earth. With such a spectacular farewell performance by the sun, it is naturally impossible for humans to survive, so we need a hypothesis. Assuming that neither the helium flash nor the expansion occurs, and the sun is quietly extinguished, then is there any hope for human survival?

When the sun just goes out, we don't notice it immediately because there is a distance of 149.6 million kilometers between the earth and the sun, and the speed of light is 299,792,458 meters per second, so it takes about 8 minutes for sunlight to reach the earth.

Since the sun we see is the sun from 8 minutes ago, we can continue to enjoy the sun for 8 minutes after the sun goes out. After 8 minutes, darkness will suddenly fall. Facing the sudden disaster, the thing we want to do most may be to talk to our relatives and friends, but we must hurry up because the communication will be interrupted soon.

The extinction of the sun will directly cause various satellites and spacecraft to lose their energy sources, because most of them rely on solar energy for charging.

The loss of energy for satellites and spacecraft will directly affect some communications, but not all, because mobile phones, telephones, and radio broadcasts do not rely on satellites, so we are not completely in the dark. We can still get information from the outside world and find out what is happening. Knowing that the sun has gone out, we will not be surprised by the subsequent drop in temperature. The sun is the only source of energy for the earth. Without the sun's shining, global temperatures will drop rapidly. It won't be long before you can skate on the sea.

The initial temperature drop is still within an acceptable range, similar to previous cold winters, but after a month, the average surface temperature will drop below minus 40 degrees Celsius, which will be unbearable and impossible to stay outdoors for a long time.

Due to the heat preservation effect of the atmosphere, the temperature drop speed is not too exaggerated, but after a year, the surface temperature will still drop below -100℃, and the earth will become a real frozen planet. If only the temperature drops, humans can still stay in the underground shelter, but now there is another more serious problem.

The sun is the only source of energy for the earth, and the basis for the survival of any living organism is energy absorption. Without a source, the energy that living organisms can absorb will become less and less.

Plants solidify the energy in sunlight through photosynthesis, and then herbivores obtain energy by eating plants. Carnivores then eat herbivores to obtain energy. After the sun goes out, plants cannot carry out photosynthesis and will gradually wither. The collapse of the bottom food chain will directly lead to the collapse of the entire food chain, so there are fewer and fewer plants and animals until they are completely extinct. At this point, humans will have no food source.

The lack of food is fatal, but the most fatal problem is not this, but oxygen.

Oxygen did not exist on the earth from the beginning. When the earth was first formed, there was no oxygen, so there was no life. Oxygen was produced by the first algae through photosynthesis. After the sun disappears, plants cannot carry out photosynthesis, and oxygen will gradually decrease until it disappears. Without oxygen, there is really no hope of survival. So even if the sun goes out quietly, it will be difficult for humans to survive with the power of technology, and all life will enter a countdown. Fortunately, all this will not happen, at least not in the next few billion years.

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