If the earth is tidally locked by the sun, there will be a phenomenon of eternal night and day, but it is the end of the earth's species

Tidal locking in astronomy refers to the phenomenon that celestial bodies lose their autonomous rotation due to gravitational locking. The moon has been tidally locked by the earth, so one day on the moon and the time it takes to revolve around the earth are equal, which is one month on our earth, and because of tidal locking, the moon can only always face the earth on one side, That's why we only see one side of the moon.

If the earth is tidally locked by the sun's gravity, then the earth will not be able to rotate independently, and its rotation time will also be equal to the revolution time, that is to say, the time of one day on the earth is equal to the time of one year, but because the earth can only rotate on one side It faces the sun, so the earth will always face the sun with one side facing the earth, and the other side will always be facing away from the sun, that is to say, there will be a phenomenon of eternal night and eternal day, and there will no longer be an alternation of day and night.

In this way, one side of the earth will always be illuminated by sunlight, while the other side will forever lose sunlight, resulting in the phenomenon of ice and fire. On the side that is illuminated by the sun, the central part will be unbearably hot due to the strong light. Under the sunlight, many animals and plants will not be able to survive, while the side that is always dark will drop to minus one or two hundred degrees Celsius, and the animals and plants are even more so. It is difficult to survive, the ocean will freeze into a whole block of ice, and there are only conditions for life to survive in parts of the sun obliquely and in the areas where day and night intersect.

In this way, the area where life can survive on the earth will be greatly reduced, which is basically less than 1/4 of the current one. If this is the case, these areas will become resources that humans and other biological species compete for. And because the earth cannot rotate like it does now, the atmospheric circulation on the earth will also be greatly slowed down, the winds and rainfall will also be less, the areas with suitable temperature on the earth will also become dry, and the dark side of the earth will be minus one or two. When the cold wind of 100°C blows to the sunny side of the earth, the sharp cooling will kill many biological species, so various meteorological conditions are not conducive to the survival of life. After a long time, there will be very few life species on the earth. , most species of life will tend to go extinct. Therefore, if the earth is tidally locked by the sun, it is basically equivalent to the end of most biological species.

However, since human beings have developed a technological civilization, some human beings can still survive through technological means, such as building some translucent buildings in areas with direct sunlight to block part of the sunlight, and can also create an environment for animals and plants to survive. On the dark side of the earth, human beings can also build a closed base underground, use electricity to simulate the natural ecological environment, and also provide living space for some people and creatures.

It is generally believed that the earth's rotation is caused by the collision of stars when the early earth was formed. At the beginning, the earth's rotation is likely to be less than ten hours a day. After the moon is formed, the rotation speed of the earth is due to the drag phenomenon of the moon's gravitational force. Slowing down, the rotation of the earth has reached nearly 24 hours now, and in the future, the rotation of the earth will become slower and slower under the combined action of the moon and the sun, but it will be a long time before it is locked by the sun's gravity. Under the influence of the moon's gravity, the earth is basically unable to be tidally locked by the sun.