With the advancement of human technology, we now know that the earth is a planet in the solar system. In the solar system, there are eight planets, namely Mercury, Venus, Earth, Mars , Jupiter , Saturn , Uranus and Neptune . There is also an Pluto outside Neptune. Pluto was once a planet, but later scientists believed that Pluto was too small in size and mass, so they kicked Pluto out of the ranks of planets. Among the eight planets in the solar system, only the planet on Earth has given birth to life. The emergence of life has added a lot of color to the planet on Earth, especially after the appearance of humans, it has unraveled many mysteries on Earth.
According to scientists' research, we can know that the earth is rotating and revolving continuously every moment. Earth's rotation is a way of movement of the earth. It refers to the earth rotating around the axis of rotation, and the direction of this rotation is from west to east. It is precisely because of the earth's rotation that we can determine the time of day. In order to facilitate timekeeping, humans divide the day into 24 hours. However, since the birth of the earth, its rotation speed has not been constant. Scientists have found through research that about 4.6 billion years ago, the time for the earth to rotate in a circle only takes 6 hours. 4.6 billion years ago, that is, the early stage of the birth of the solar system, about 5 billion years ago, the solar system was in chaos. After the birth of the sun, it absorbed a large amount of matter around it.
So the mass of the sun accounts for 99.86% of the total mass of the solar system, and the remaining eight planets and other matter account for 0.14% of the total mass of the solar system. From the proportion, we can see that the mass of the sun is very large. Among the planets in the solar system, the rotation speed of each planet is different. So why did the earth change from the first 6 hours to the current 24 hours? This actually has a lot to do with the moon. I believe everyone is very familiar with the moon. The moon is the only satellite on Earth, and it is also the celestial body closest to the earth. Because of the emergence of the moon, the rotation speed of the earth slowly decreased.
This is because there is a kind of traction between the moon and the earth. This traction force causes tidal effects on the earth, such as the ebb and flow of tides on the ocean. Since the moon's revolution speed is much slower than the earth's rotation speed, the speed of moon rotation is getting slower and slower. After billions of years of changes, the earth has only become today's 24 hours. In addition, if the moon does not move relatively stably in orbit, the state of the earth itself will not be so stable. Therefore, the existence of the moon is more conducive to the survival of life on earth. Seeing this, many friends may have a question, that is, how the moon was formed?
Some scientists believe that the moon was once part of the earth. Because according to the gravity of the earth, the earth cannot capture the moon. Therefore, scientists speculate that in the early days of the solar system, a large-scale asteroid hit the earth and knocked out a small part of the earth. The part that was knocked out became the moon. Although this is only a scientist's guess, it makes sense. However, according to the latest research by scientists, the speed of the earth's rotation has been accelerated in recent years, and it has been less than 24 hours a day. What is going on? Scientists calculated that on July 19, 2020, we spent the shortest day in 50 years, on which time the Earth completed its rotation 1.4602 milliseconds in advance.
Seeing this, many friends may say that 1.4602 milliseconds can be ignored. If we come from the perspective of humans, this number can be basically ignored because this number will not have a huge impact on life on Earth. However, for special industries, this number is very important. For example, Aerospace Technology , even if there is an error of several milliseconds, it may cause serious consequences. It may take thousands or tens of thousands of years to accelerate the earth's rotation. If the earth's rotation is fast, what impact will it have?
First of all, the shape of the earth will change. Due to the rotation of the earth, the earth is not a perfect spherical shape. At present, the two poles of the earth will be flattered and the equator has slight bulges. If the earth's rotation speed accelerates, the earth's equator will increase by several thousand kilometers. At this time, our earth looks like a flattened sphere, and the speed of the earth's rotation speed will put huge pressure on the earth's crust. This will lead to strong earthquakes and volcanic eruptions very frequently. This is very serious for life on earth. Once, 65 million years ago, an asteroid hit the earth, causing 90% of the creatures on the earth to perish. At that time, the overlord on the earth was still a dinosaur.
Dinosaurs have ruled on the earth for 160 million years. If it weren't for the asteroid impacting the earth, a large number of volcanoes erupted on the earth, then the dinosaurs might still be alive. In addition to these, the accelerated rotation speed of the earth will cause the earth's atmosphere to concentrate in the equatorial area, and then completely change the earth's weather. Since the rotation speed of the atmosphere is the same as that of the earth, global storms will become stronger by then, and hurricanes formed in the ocean will become larger. Although the speed of the earth's rotation in a short period of time cannot cause these serious effects, these may occur tens of thousands of years or hundreds of millions of years later.
For humans, tens of thousands or hundreds of millions of years are very long, but for the earth, these are all a moment of time. After all, the earth has been 4.6 billion years since its birth. In the long years of the earth, the earth has experienced many changes. With the changes in the earth's environment, the organisms on the earth have also experienced five mass extinction events. Humans were born after the fifth mass extinction. However, among the many organisms on the earth, humans are the wisest life on the earth. Since its birth, humans have begun to constantly explore the mysteries of the world. After thousands of years of technological development, humans have finally been able to leave the earth to explore the universe.
Although humans have now had a rough understanding of the universe, there are still many mysteries that humans cannot explain in the universe. However, with the advancement and development of human technology, the editor believes that in the near future, humans will definitely be able to unlock all the mysteries in the universe. The editor hopes that this day will come soon. Do you have anything to say about this?
