What if there were only night and no day in the world

Many netizens have opened their minds and asked what kind of phenomenon it would be if there was always day on earth. First of all, we must make a reasonable description of this phenomenon, and explain and analyze it. After all, everyone should know that there are countless headlights rotating around the earth and continuously emitting light, which seems too mysterious. Moreover, adding a certain sun to the solar system and even the Milky way will certainly disturb the trajectory of all celestial bodies, so there is no way to achieve the goal of full daylight. This is because the earth itself has revolution and rotation, so it must have a side facing away from the sun, that is, the night. If we let the earth stop, then the positive side will always be day, of course, the negative side will always be night, but this result is different from the question in some aspects. But it’s only the most likely hypothesis so far, so we use it to substitute.

Well, as I said just now, if the rotation and revolution reach the same time, there needs to be a phenomenon, that is, tidal locking. This phenomenon is common in the universe – for example, the moon is like this. If the earth exists long enough, then the earth will be locked by the sun’s tides finally. So now, it seems that the reason is that the moon gradually moves away from the earth and absorbs water The speed of the earth’s rotation is further simplified and accelerated, which is locked by the solar tide.

So what are the reasons for long-term lock-in? There are two main categories that have been analyzed online.


The first is climate change. Through computer simulation program analysis, we can see that when the earth is facing the sun, one side is always day, and the other side is always night, so we can see that there will be a huge temperature difference. Under the temperature difference, there will be strong convection, making the wind continuously blow from night to day, which means that the wind from the night hemisphere will always be transmitted, and from the day hemisphere. There is also an atmosphere on the earth. Due to the convection of the atmosphere, the temperature difference between the two hemispheres is not very huge. It is 40 degrees above zero and 40 degrees below zero. The temperature difference between the two hemispheres is only about 80 degrees. In addition to atmospheric convection, there is also ocean convection. Ocean convection makes the sea ice very slowly, which means that there is no obvious frozen sea area in 50 years. At the same time, the narrow zone between day and night is really the area with moderate temperature. However, due to the opposite flow of wind, this part of the area is very dry, and it is adjacent to the equator where the precipitation is concentrated District.

The second is to notice the influence of the earth’s own shape on the atmosphere and oceans. As we all know, the earth is not a standard circle or a standard sphere, but an ellipsoid with slightly swollen equator and slightly depressed sides. After all, its radius is 6357 km, but the equatorial radius is only 6378 km. The atmosphere and sea water can really cover all the longitude and latitude of the earth. If we proceed with our assumption that the earth’s rotation speed drops to only one week a year, then the centrifugal force can also be reduced, or even be reduced to a negligible level. In this case, the sea water and the atmosphere will not change Due to the further reduction of centrifugal force, it will continue to move to low latitudes. Therefore, a continent around the earth will be formed in the middle of the earth, and the continent is annular, while the north and south sides will become oceans.

All this seems very beautiful and reasonable, but the habitable area of this continent is not large, because the atmosphere can only cover the area above 30 degrees north and south latitude, and most of this continent is plateau above 10000 meters above sea level. If the earth is locked by the solar tide, it will gradually become a standard sphere, so that the sea water and atmosphere just mentioned can be heavy Back to low latitude, the mantle is a solid with high viscosity, so the process must be very long.


So from the above point of view, assuming that the speed of the earth’s rotation gradually slows down, and it must slow down gradually – otherwise, due to the sudden loss of self weight, speed and inertia, everything on the earth’s surface will be thrown into the mid air, then it can be determined that animals and plants will basically die out, and the point of direct sunlight must stay on the equator. The air near the equator is very thin, and the strong heat does not make the atmosphere produce a strong flow. Where there is air, the heat of the sun is very limited. If this is the case of the daytime hemisphere, then the nighttime hemisphere means that there is no sunlight at all. Moreover, because the nighttime hemisphere is too far away from the direct point of the sun, the input and output of ocean heat are relatively small, and the evaporation of sea water is also small, so there is no water vapor deep into the inland, so there is no precipitation on the inland, which makes it very dry.

Finally, the ocean will start to freeze from the night hemisphere and gradually spread to this hemisphere. Many years later, the whole ocean will be frozen. At this time, the animals and plants on the earth will be extinct for the second time in our hypothesis, and it is uncertain whether there will be some surviving fish under the sea ice.

This is the scene when the earth has been in the daytime, species extinction, dry air, sea ice, this is a very cruel world.


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