What is the driving force of the earth’s rotation and revolution

2022-04-26 0 By

In ancient times, when science was not developed, people believed that the earth was the center of the universe, and that the sun, moon and stars moved around the earth.We now know that the Earth is not the center of the universe, or even of the solar system. It’s a 4.5-billion-year-old rock and metal planet, a tiny speck of dust suspended in the solar system, and we ourselves may not even be the bacteria on the dust.Scientists have also shown that the shift of day and night, previously considered the best evidence of the movement of stars around the Earth, is caused by the Earth’s rotation itself, which science has pinpointed to a speed of 465 meters per second.The rotation period is 23 hours and 56 minutes, and the revolution period is 365 days, 58 minutes and 56 seconds. Why can the Earth always maintain such a fast rotation and revolution speed in the 4.5 billion years since its birth?The earth’s rotation is an inertial process, and the first driving force behind it was the collapse of the solar nebula 4.6 billion years ago, when hydrogen was trapped in the nebula as it spun and collapsed near a supernova.High temperature and pressure conditions are created in this cloud and when the temperature and pressure reach a certain level, hydrogen fusion reactions are triggered.Most of the solar nebula together became a star in the rotation, which is today we see the sun, because the original nebula itself in the rotation, so the birth of the sun in the rotation of the cloud inherited the angular momentum of the original nebula, also started the rotation, and the rest have not been able to become a part of the sun began to star plate, condensed into a rocky metal planetesimals,The planetesimals also inherited angular momentum from the original nebula, colliding and merging with each other as they rotated, eventually forming the eight planets and moons we see in our solar system today.Earth 4.55 billion years ago in constant collision integration after forming, a mars-sized body crashed into a new earth, from the side impact the earth’s axis directly to the high power of the hit on the tilt, the collision fragments in under the action of gravity, become the only natural satellite of the earth to gather together, we can see the moon now.What’s interesting is that after this earth-shattering collision, the earth had different seasons and different dimensions of the earth received different amounts of sunlight, so that when the sun hit a certain area, it was summer and winter or spring and autumn.But the Earth doesn’t spin forever, and although space is a vacuum with almost no main force and the Earth doesn’t need to do any work to transfer the spinning energy, the sun, 150 million kilometers away, is actually pulling on the Earth all the time.Astronomers believe that over enough time, the Earth will be tidally locked by the sun’s gravity just as the moon is tidally locked by earth’s gravity.Tidally locked by the sun, the Earth would rotate at the same speed as its orbit, with one side of the earth always facing the sun and the other side never seeing the sun.