And under the action of this force, it began to move in the direction of the ether, and the earth was attracted by the sun when it was acted on by the ether. Under the action of these two decisive forces, the earth began to rotate.
Various theories or hypotheses about the earth's rotation. Considering that the reason of the earth's rotation should be combined with the earth's revolution, there is no absolutely stationary object in the universe, and the massive celestial bodies subjected to various external forces must rely on rotation to maintain their balance in order to maintain their own movement. Small-mass particles must also rely on rotation to maintain their own movement balance because of their extremely fast movement speed.
Extended data
The mass distribution of the earth itself determines its rotation, just as the shape and weight distribution of a gyro determine its motion. In addition, since the 1990s, relevant space-based measurement data have also confirmed that the earth's axis of rotation moves several centimeters every year, and it usually moves to Hudson Bay in northeastern Canada.
Researchers know that part of this fluctuation is caused by the adjustment of glacier balance, which has been going on since the end of the ice age of 16000 years ago. As the glaciers recede, the land below will gradually emerge. For thousands of years, the land under the glacier swelled like bread dough. In some places on the edge of the ancient ice sheet, the land may also collapse because the ice forces it to uplift upward. )
Baidu Encyclopedia-Earth Rotation