Traditional Culture Encyclopedia - Photography major - Why can't people on earth feel that the earth is turning?
Why can't people on earth feel that the earth is turning?
The position of the earth's rotation axis on the earth is constantly changing. 1765 L Euler proved that if there is no external force, the rotation axis of the rigid earth will swing freely around the shape axis.
It was not until 1888 that people confirmed the existence of the pole shift from the observation of latitude changes. In 189 1, S.C. Zhang Dele of the United States further pointed out that the pole shift includes two main periodic components.
Extended data:
The equatorial plane of the earth's rotation, the ecliptic plane of the earth's revolution around the sun and the white plane of the moon's revolution around the earth are not in the same plane.
Because of these factors, the rotation axis of the earth has complex motion in space under the gravity of the moon, the sun and the planets. This movement is usually called precession and nutation.
The earth's axis always points to Polaris. In the orbit of the sun, when the motion time is equal, the arc areas of the earth and the sun are equal.
Baidu Encyclopedia-Earth Rotation
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