* Mass vs. Weight: Mass is the amount of matter in an object. Weight is the force of gravity acting on that mass.

* Constant Mass: Your mass stays the same regardless of where you are in the universe.

* Changing Weight: Your weight changes depending on the gravitational pull of the planet or celestial body you're on.

Therefore, if someone weighs 55kg on Earth, their mass on Pluto would still be 55kg.

Their weight on Pluto would be different, but their mass remains constant.