How does the earth move?
The rotation of the earth:
The earth rotates from west to east. When one side of the earth rotates facing the sun, people on this side can see the sun. When the other side rotates to face the sun, the opposite person can't see the sun.
The revolution of the earth:
The earth is also constantly revolving around the sun, which is an elliptical orbit. The direction of revolution is also from west to east, and the north pole of the earth axis always points to the vicinity of Polaris during the revolution.
The relationship between the earth's rotation and revolution;
The rotation and revolution of the earth are two relatively independent but interrelated movements. When the earth rotates to a certain position, it will start to revolve around the sun. This position is called "vernal equinox" and is located on the ecliptic near Aries.
The periodicity of the earth's motion;
The rotation and revolution of the earth are periodic movements. The rotation period is sidereal day, about 23 hours, 56 minutes and 4 seconds; Period of revolution is a sidereal year, about 365 days, 6 hours and 9 minutes 10 second. In addition, the orbit and inclination of the earth also change periodically.
Geographical significance of earth movement;
The movement of the earth has a far-reaching impact on the geographical environment. Because of the rotation and revolution of the earth, it leads to the alternation of day and night and the change of seasons. At the same time, the tilt angle of the earth also makes the amount of solar radiation received by different regions different, thus affecting the geographical characteristics and climatic conditions of different regions.
Measurement and prediction of earth motion;
In order to better understand and predict the movement of the earth, scientists have carried out a lot of measurements and studies. Through accurate observation and calculation, they can predict the occurrence of solar eclipse, extreme day and night, and accurately predict tidal phenomena.
Human beings know the process of earth movement;
Human understanding of the earth's movement has gone through a long process. Ancient people generally believed that the earth was the center of the universe, but with the progress of science and technology, Copernicus proposed Heliocentrism, Kepler discovered the three laws of planetary motion, and Newton discovered the law of universal gravitation. These theories laid the foundation for us to understand the movement of the earth.
The future trend of the earth's movement:
According to scientists' prediction, the movement of the earth will change in the future. Due to the gravity of the moon and the sun, the rotation and revolution speed of the earth will gradually slow down. At the same time, the tilt angle of the earth will change significantly in millions of years. These changes will have a far-reaching impact on the climate and geographical environment of the earth.