Difference Between Earth Gravity and Moon Gravity

Main Difference

The main difference between earth gravity and moon gravity is that earth gravity is stronger because of bigger and has massive objects that exert more gravity, whereas moon gravity is weaker than earth gravity because of the moon being smaller in size.

Earth Gravity vs. Moon Gravity

The gravity present on the surface of the earth is equal to 9.8 m/s2, whereas the gravity of the moon present on the lunar surface is only 1.63 m/s2. The earth gravity is very precisely mapped, while the moon gravity is very poorly mapped. The earth gravity is strong enough to sustain and withstand an atmosphere on the earth; on the other hand, there is no atmosphere present on the moon gravity.

Earth is bigger as compared to the moon; on the contrary, the moon is smaller in size as compared to the earth. Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in earth; on the flip side, the moon’s gravity is weaker than the earth due to smaller in size as compared to the earth. Earth gravity is denoted by g; conversely, moon gravity is denoted by gm.

Comparison Chart

Earth GravityMoon Gravity
Earth gravity is the total acceleration that is communicated to the objects because of the combined effect of gravitation and the presence of centrifugal force.Due to the gravity present on the surface of the moon, its total acceleration is 1.62 m/s2.
Gravity on the Surfaces
9.8 m/s21.62 m/s2
Mapped
Very precisely mappedVery poorly mapped
Atmosphere
Strong enough to sustain and withstand an atmosphere on the earthThere is no atmosphere present on the moon gravity
Size
Earth is bigger as compared to the moonMoon is smaller in size as compared to the earth
Gravitational Strength
Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in earthThe moon’s gravity is weaker than the earth due to smaller in size as compared to the earth
Denoted By
ggm

What is Earth Gravity?

Earth gravity is the total acceleration that is communicated to the objects because of the combined result of gravitation and the presence of centrifugal force from the earth’s rotation. Earth gravity is denoted by small g, or gravitational constant is denoted by big G. The SI unit of acceleration of earth gravity is measured in meters per second square m/s2 and which is correspondent to newton per kilogram.

The acceleration of the gravity close to the surface of the earth is about 9.8m/s2. The precise and accurate strength of earth gravity varies depending on location. The value of Standard gravity of earth’s surface is 9.80665 m/s2. The earth’s surface is rotating 24/7 hours, so it is not an inertial frame of reference.

The outward centrifugal force which is produced by earth’s rotation is larger at latitudes just near the equator. The second foremost reason for the alteration in gravity present at different earth’s latitudes is due to earth’s equatorial prominence. The gravity of earth decreases with the increase of height because larger height means more difference from the earth’s midpoint.

Some various factors like in water or in air, the objects practice an associative resistance force that decreases the superficial force of earth gravity. The earth gravity is strong enough to sustain and withstand an atmosphere on the earth. The acceleration of earth gravity is a vector quantity. The Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in the earth.

What is Moon Gravity?

Due to the gravity present on the surface of the moon, its total acceleration is 1.62 m/s2, which is about 16.6% that is present on the earth’s surface. But over the entire surface of the moon, the gravitational acceleration is about 0.0253 m/s2 because weight is directly depending upon gravitational acceleration.

All the things on the moon will only weigh 16.6% as compared to what they weigh on earth such if someone’s weight on earth is 200 pounds then on the moon, his weight will be 30 pounds. The gravitational acceleration of the moon has been measured by following the radio signals released by orbiting spacecraft.

The major specialty of mon gravity is the presence of mascon which is the large positive gravity anomalies directly associated with some of the giant impact basins. The moon’s gravity is weaker than the earth gravity due to the smaller in size as compared to the earth. As there is no atmosphere present on the moon gravity, so there are fewer chances of withstanding temperature.

Key Differences

  1. The gravity present on the surface of the earth is equal to 9.8 m/s2, whereas the gravity of the moon present on the lunar surface is only 1.63 m/s2.
  2. Earth gravity is denoted by g; conversely, moon gravity is denoted by
  3. The earth gravity is very precisely mapped, while the moon gravity is very poorly mapped.
  4. The earth gravity is strong enough to sustain an atmosphere; on the other hand, there is no atmosphere present on the moon gravity.
  5. Earth is bigger as compared to the moon; on the contrary, the moon is smaller in size as compared to the earth.
  6. Earth’s gravitational force is stronger than the moon because of the presence of more massive objects in the earth; on the flip side, the moon’s gravity is weaker than the earth due to smaller in size as compared to the earth.

Conclusion

Above discussion concludes that the earth gravity is stronger than the moon gravity because earth is more massive, whereas moon gravity is weaker than earth gravity because of the moon being smaller in size.

Author:

Harlon Moss

Harlon currently works as a quality moderator and content writer for Turpy Media. He graduated from the University of California in 2010 with a degree in Computer Science. Follow him on Twitter @HarlonMoss or on Pinterest @HarlonMoss

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