Rather, most TNOs have trajectories that keep them relatively close enough to Neptune for extended periods of time such that they can be controlled by the ice giant's gravity. The team ...

Neptune, for example ... To contain so much water, the planets must “accrete,” or gather under its immense gravity, ice-rich ...

And we measure this in multiples of the strength of Earth's gravity, known as 1G. The first planet I'm travelling to is Neptune. Its gravity is just fractionally stronger than here on Earth.

g in N/kg 9.2 Mass of student on the surface of each planet in kg 64 Weight of student on the surface of each planet in N 589 Planet Neptune Gravity on the surface, g in N/kg 11.2 Mass of student ...