There is ether in the universe. Because the existence scope of the ether is infinite and it is always in motion, the earth and the sun are both in the ether, and both the earth and the sun will be subjected to the force of the ether.
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.
When the original rotating nebula material shrinks by itself under its own gravity, due to the conservation of angular momentum, the more it shrinks, the greater its density and the faster it rotates. When the planet is formed, the rotational angular momentum of the nebula material becomes the calculated rotational angular momentum.
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Significance of the Earth's Rotation
1. When the earth rotates, objects moving horizontally in any direction on the earth will deviate from the original direction. Based on the moving direction of the moving object, the horizontal object in the northern hemisphere leans to the right and the southern hemisphere leans to the left.
2, leading to the emergence of local time. The sunrise in the east is earlier than that in the west, and the time in the east is earlier and the time in the west is later.
3. The diurnal apparent motion of celestial bodies is due to the rotation of the earth. Observers on the ground see celestial bodies circling from east to west along a small circle parallel to the equator in a sidereal day. In the photos taken by astrophotography in the Arctic sky, we can clearly see the orbits of the stars near the North Pole on Sunday.
4, leading to alternation of day and night. The earth is neither luminous nor transparent, and its rotation alternates day and night.
Baidu encyclopedia-the earth changes itself