How strong is the gravity on Neptune?
Although Neptune is much larger than Earth, its surface gravity is about the same as the surface gravity on Earth. This is because Neptune is made up of gases and is not solid like Earth. This makes Neptune very light for its size. The surface gravity on Neptune is about 110% of the surface gravity on Earth, so if you weigh 100 pounds on Earth, you would weigh 110 pounds on Neptune (assuming you could find someplace to, well, stand).