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Planet Neptune
Gravity

What is the gravity on Neptune like?

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June 30, 2012 11:01AM

To answer this we must start by taking a look at Neptune's mass.

Neptune's mass is about 1.02 x 1026 kg.

It would take over 17 Earths to fill up Neptune, but the gravity on Neptune is only 1.19 times of the gravity on Earth. This is because it is such a large planet (and the gravitational force a planet exerts upon an object at the planet's surface is proportional to its mass and to the inverse of its radius squared).

A 100-pound person would weigh 112.5 pounds on Neptune.

If the object is massive it will gain gravity but if it is large it will lose gravity at a greater rate.