Value of Gravitational Constant

What is the Gravitational Constant?

The gravitational constant is the proportionality constant that is used in the Newton’s Law of Gravitation. The force of attraction between any two unit masses separated by a unit distance is called universal gravitational constant denoted by G measured in Nm2/kg2. It is an empirical physical constant used in gravitational physics. It is also known as Newton’s Constant. The value of the gravitational constant is the same throughout the universe. The value of G is different from g, which denotes the acceleration due to gravity.

Want to know the history of gravitation? Watch the below video to understand the history of gravity that starts with Copernicus. It also explains what brought about the change in belief from the geocentric model of the universe to the heliocentric!


What is the value of capital G?

In physics, the value of capital G (gravitational constant) was initially proposed by Newton.

G = 6.67408 × 10-11 N m2 Kg-2

The value of gravitational constant on the moon or on mars or at any part of the universe remains unchanged making it an invariant entity.

Gravitational Constant Fundamentals

Below, in a table, we have listed all the fundamentals of Universal gravitational constant or G in brief.

Symbol Definition Nature of Value Dimensional formula SI Unit

Universal Gravitational Constant

G The force of attraction between two objects with unit mass separated by a unit distance at any part of this universe. Constant at any point in this universe.

G = 6.67408×10-11Nm2/kg2

[L]3[M]-1[T]-2 Nm2/kg2

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Applications:

  • Gravitational Constant was initially studied by Sir Isaac Newton through his Universal law of gravity.
  • This was further applied by Einstein in this theory of relativity.
  • This empirical constant is exclusively applied to study gravitational effects at various disciplines.

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