The diagram shows the relative strength of the gravitational force for planets of different masses. The size of each planet represents the planet’s relative mass. The arrow length indicates the relative amount of gravitational pull that each planet would exert on an astronaut in space. You would weigh the most on? Your answer: Earth, because it has the most gravity. any planet, because weight does not change as you move from planet to planet. Pluto, because it is the farthest from the sun. Jupiter, because it has the most mass.