The surface gravity of Neptune is 36.6 feet per second squared, or 11.5 meters per second squared. A person weighing 100 pounds on the Earth would weigh about 114 pounds on Neptune.
The mass of Neptune is more than 17 times greater than the Earth. By comparison, if the Earth were reduced to the size of a nickel, Neptune would be the size of a baseball.
Neptune is a gas giant composed of water, ammonia and methane surrounding an Earth-sized solid core. The atmosphere is mostly hydrogen, helium and methane.
Neptune is the eighth planet and is the farthest from the sun. It was the first planet whose existence was predicted from mathematical calculations before it was observed through a telescope.Learn More
The surface gravity of Jupiter is 81.3 feet per second squared, about twice the surface gravity on Earth. An object that weighs 100 pounds on Earth weighs 253 pounds on Jupiter.Full Answer >
The acceleration due to gravity on the surface of Uranus is 8.69 meters per second squared. The value of this acceleration due to gravity on the earth's surface is 9.81 meters per second squared. So the gravitational pull of Uranus is 86 percent of that of Earth.Full Answer >
The gravity on Venus equals 8.87 m/s2. With a mass of 4.87 x 10^24 kg, the planet has almost as much mass as the Earth, which is why Venus' gravity is roughly the same as Earth's gravity of 9.81 m/s2.Full Answer >
Objects near to Earth can move at a wide range of speeds, but the theoretical maximum velocity for anything on or around the planet is 11.2 kilometers per second. This upper limit is defined by the escape velocity of Earth. Anything moving above this threshold will be ejected to space.Full Answer >