Difference Between Gravity on Earth and Moon

Gravity on Earth vs Moon

Gravity is a concept associated with matter. A gravitational field is defined for masses, there is a gravitation field around every mass that is proportional to the mass, and inversely proportional to the distance from the mass squared. Gravity on the earth, and the moon are extremely important when it comes to scientific experiments such as satellite launches, calculating satellite orbits, manned space missions, calculating paths of asteroids, and many more. There are several methods for mapping gravitational field of the earth and moon. Some are very precise methods and some methods have a considerable margin of error. In this article, we are going to discuss the methods of measuring gravitational fields of the earth and moon, the anomalies of gravitational fields of these two objects, importance of precise mapping of gravity of the earth and moon, the magnitudes of these two fields and their differences.

地球引力田

The gravitational field of the earth is easily calculable, if we assume the earth as a perfect sphere. If that is the case, by simply substituting the mass of the earth and the radius of the earth to the equation g = GM/R²we can get a value for ‘g’ on the surface of the earth. But, the gravitational field of the earth is not uniform. Therefore, more advanced and precise techniques such as satellite mapping are required to measure the correct gravitational field of the earth. The mean or normal gravitational field strength on the surface of the earth is 9.8066 meters per seconds squared. This varies with the altitude and latitude of the place.

Gravitational field of moon

月球的引力场不能直接使用在月球上执行的科学实验直接测量。有必要使用远程技术，例如卫星映射。使用卫星映射来映射月亮的引力场的唯一问题是月球的同步旋转和革命。由于这个原因，只有月亮的近侧才能精确映射。月球的远端未正确映射。月亮还具有引力异常。由于月球的质量约为地球的1/80，半径约为地球的1/3.7，因此一个简单的计算表明，地球表面的重力场等于平方平方的1.63米。这是地球重力场强度的16.7％。这意味着质量为100公斤，重量为980 n的重量只能给出地球上163 N的重量。这大约是地球上重量的1/6。

What is the difference between gravity on earth and moon? • Gravity or gravitational field intensity on the surface of the earth is equal to 9.8 m/s2, while the gravitational field intensity of the moon on the lunar surface is only 1.63 m/s2. • The earth’s gravitational field is very precisely mapped, while gravitational field of the moon is poorly mapped. • The gravity of the earth is strong enough to keep an atmosphere, while the gravity of the moon is not strong enough.