**Newton’s law of universal gravitation states **

**where: F is the force between the masses, G is the gravitational constant, M1 is the first mass, M2 is the second mass, and R is the distance between the centers of the masses. **

**The gravitational force at the planet’s surface is **

** where: F is the gravitational force, M2 is the second mass, g is the ****acceleration** of gravity.

**Let’s consider M1 is the planet/star and M2 is the object on the surface of the planet/star.**

**Now, we could calculate g where we want at the Universe.**

**Examples:**

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[…] g = G*M/r^2 . (3) (Learn more How do you calculate g?) […]

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