The Influence of the Moon's Gravity on the Earth

The gravity of the moon has a tidal force on the earth.

Tides are caused by the attraction of the moon. Tides are periodic fluctuations of seawater. Because the day is morning and the night is evening, it is called "tide" and the night is called "sunseeker"

The law of universal gravitation shows that gravity is directly proportional to the product of the mass of two objects and inversely proportional to the square of the distance between them. The attraction of the sun to the earth is much stronger than that of the moon, but the tidal force of the sun is less than that of the moon 1/2.

The tidal force of the moon will not only generate tidal waves on the earth, but also cause atmospheric tides. But the atmospheric tide is far less earth-shattering and magnificent than the ocean tide. And because we are in it, it is difficult to detect.

In addition, tidal force will make the earth's body, including the earth's surface (the part below the mainland and the seabed) produce tides, which are called solid tides. The earth's surface fluctuation caused by solid tide is very small, which can only be measured by precision instruments, and may have a slight impact on the earth's gravity field.

Part of the earth is liquid, so there will be tides. Some people think that tides on the earth are one of the causes of earthquakes.

Actions are always relative. Where there is action, there is reaction. The moon has tidal force to the earth, and conversely, the earth has tidal force to the moon. It stands to reason that the mass of the earth is more than 80 times larger than that of the moon, and the tidal force of the earth on the moon will be great.

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