Coulomb's Law and the Law of Universal Gravitation are both fundamental laws of physics that describe the interactions between particles.

Both laws describe how the force between two particles depends on the distance between them. Coulomb's Law applies to charged particles and the Law of Universal Gravitation applies to massive particles.

The equivalent of vacuum permittivity for gravitation is the gravitational constant (G), which appears in the Law of Universal Gravitation. Just as vacuum permittivity (ε0) is related to the strength of the electric force between charged particles, the gravitational constant is related to the strength of the gravitational force between massive particles.
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